openforcefield.utils.toolkits.OpenEyeToolkitWrapper¶
-
class
openforcefield.utils.toolkits.
OpenEyeToolkitWrapper
[source]¶ OpenEye toolkit wrapper
Warning
This API is experimental and subject to change.
- Attributes
toolkit_file_read_formats
List of file formats that this toolkit can read.
toolkit_file_write_formats
List of file formats that this toolkit can write.
toolkit_installation_instructions
classmethod(function) -> method
toolkit_name
Return the name of the toolkit wrapped by this class as a str
toolkit_version
Return the version of the wrapped toolkit as a str
Methods
assign_fractional_bond_orders
(molecule[, …])Update and store list of bond orders this molecule.
assign_partial_charges
(molecule[, …])Compute partial charges with OpenEye quacpac, and assign the new values to the partial_charges attribute.
canonical_order_atoms
(molecule)Canonical order the atoms in the molecule using the OpenEye toolkit.
compute_partial_charges_am1bcc
(molecule[, …])Compute AM1BCC partial charges with OpenEye quacpac.
enumerate_protomers
(molecule[, max_states])Enumerate the formal charges of a molecule to generate different protomoers.
enumerate_stereoisomers
(molecule[, …])Enumerate the stereocenters and bonds of the current molecule.
enumerate_tautomers
(molecule[, max_states])Enumerate the possible tautomers of the current molecule
find_smarts_matches
(molecule, smarts[, …])Find all SMARTS matches for the specified molecule, using the specified aromaticity model.
from_file
(file_path, file_format[, …])Return an openforcefield.topology.Molecule from a file using this toolkit.
from_file_obj
(file_obj, file_format[, …])Return an openforcefield.topology.Molecule from a file-like object (an object with a “.read()” method using this toolkit.
from_inchi
(inchi[, allow_undefined_stereo])Construct a Molecule from a InChI representation
from_iupac
(iupac_name[, allow_undefined_stereo])Construct a Molecule from an IUPAC name
from_object
(object[, allow_undefined_stereo])If given an OEMol (or OEMol-derived object), this function will load it into an openforcefield.topology.molecule
from_openeye
(oemol[, allow_undefined_stereo])Create a Molecule from an OpenEye molecule.
from_smiles
(smiles[, …])Create a Molecule from a SMILES string using the OpenEye toolkit.
generate_conformers
(molecule[, …])Generate molecule conformers using OpenEye Omega.
get_tagged_smarts_connectivity
(smarts)Returns a tuple of tuples indicating connectivity between tagged atoms in a SMARTS string.
is_available
([oetools])Check if the given OpenEye toolkit components are available.
requires_toolkit
()to_file
(molecule, file_path, file_format)Writes an OpenFF Molecule to a file-like object
to_file_obj
(molecule, file_obj, file_format)Writes an OpenFF Molecule to a file-like object
to_inchi
(molecule[, fixed_hydrogens])Create an InChI string for the molecule using the RDKit Toolkit.
to_inchikey
(molecule[, fixed_hydrogens])Create an InChIKey for the molecule using the RDKit Toolkit.
to_iupac
(molecule)Generate IUPAC name from Molecule
to_openeye
(molecule[, aromaticity_model])Create an OpenEye molecule using the specified aromaticity model
to_smiles
(molecule[, isomeric, …])Uses the OpenEye toolkit to convert a Molecule into a SMILES string.
Methods
__init__
()Initialize self.
assign_fractional_bond_orders
(molecule[, …])Update and store list of bond orders this molecule.
assign_partial_charges
(molecule[, …])Compute partial charges with OpenEye quacpac, and assign the new values to the partial_charges attribute.
canonical_order_atoms
(molecule)Canonical order the atoms in the molecule using the OpenEye toolkit.
compute_partial_charges_am1bcc
(molecule[, …])Compute AM1BCC partial charges with OpenEye quacpac.
enumerate_protomers
(molecule[, max_states])Enumerate the formal charges of a molecule to generate different protomoers.
enumerate_stereoisomers
(molecule[, …])Enumerate the stereocenters and bonds of the current molecule.
enumerate_tautomers
(molecule[, max_states])Enumerate the possible tautomers of the current molecule
find_smarts_matches
(molecule, smarts[, …])Find all SMARTS matches for the specified molecule, using the specified aromaticity model.
from_file
(file_path, file_format[, …])Return an openforcefield.topology.Molecule from a file using this toolkit.
from_file_obj
(file_obj, file_format[, …])Return an openforcefield.topology.Molecule from a file-like object (an object with a “.read()” method using this toolkit.
from_inchi
(inchi[, allow_undefined_stereo])Construct a Molecule from a InChI representation
from_iupac
(iupac_name[, allow_undefined_stereo])Construct a Molecule from an IUPAC name
from_object
(object[, allow_undefined_stereo])If given an OEMol (or OEMol-derived object), this function will load it into an openforcefield.topology.molecule
from_openeye
(oemol[, allow_undefined_stereo])Create a Molecule from an OpenEye molecule.
from_smiles
(smiles[, …])Create a Molecule from a SMILES string using the OpenEye toolkit.
generate_conformers
(molecule[, …])Generate molecule conformers using OpenEye Omega.
get_tagged_smarts_connectivity
(smarts)Returns a tuple of tuples indicating connectivity between tagged atoms in a SMARTS string.
is_available
([oetools])Check if the given OpenEye toolkit components are available.
requires_toolkit
()to_file
(molecule, file_path, file_format)Writes an OpenFF Molecule to a file-like object
to_file_obj
(molecule, file_obj, file_format)Writes an OpenFF Molecule to a file-like object
to_inchi
(molecule[, fixed_hydrogens])Create an InChI string for the molecule using the RDKit Toolkit.
to_inchikey
(molecule[, fixed_hydrogens])Create an InChIKey for the molecule using the RDKit Toolkit.
to_iupac
(molecule)Generate IUPAC name from Molecule
to_openeye
(molecule[, aromaticity_model])Create an OpenEye molecule using the specified aromaticity model
to_smiles
(molecule[, isomeric, …])Uses the OpenEye toolkit to convert a Molecule into a SMILES string.
Attributes
List of file formats that this toolkit can read.
List of file formats that this toolkit can write.
classmethod(function) -> method
Return the name of the toolkit wrapped by this class as a str
Return the version of the wrapped toolkit as a str
-
static
is_available
(oetools='oechem', 'oequacpac', 'oeiupac', 'oeomega')[source]¶ Check if the given OpenEye toolkit components are available.
If the OpenEye toolkit is not installed or no license is found for at least one the given toolkits ,
False
is returned.- Parameters
- oetoolsstr or iterable of strings, optional, default=(‘oechem’, ‘oequacpac’, ‘oeiupac’, ‘oeomega’)
Set of tools to check by their Python module name. Defaults to the complete set of tools supported by this function. Also accepts a single tool to check as a string instead of an iterable of length 1.
- Returns
- all_installedbool
True
if all tools inoetools
are installed and licensed,False
otherwise
-
from_object
(object, allow_undefined_stereo=False)[source]¶ If given an OEMol (or OEMol-derived object), this function will load it into an openforcefield.topology.molecule
- Parameters
- objectA molecule-like object
An object to by type-checked.
- allow_undefined_stereobool, default=False
Whether to accept molecules with undefined stereocenters. If False, an exception will be raised if a molecule with undefined stereochemistry is passed into this function.
- Returns
- Molecule
An openforcefield.topology.molecule Molecule.
- Raises
- NotImplementedError
If the object could not be converted into a Molecule.
-
from_file
(file_path, file_format, allow_undefined_stereo=False)[source]¶ Return an openforcefield.topology.Molecule from a file using this toolkit.
- Parameters
- file_pathstr
The file to read the molecule from
- file_formatstr
Format specifier, usually file suffix (eg. ‘MOL2’, ‘SMI’) Note that not all toolkits support all formats. Check ToolkitWrapper.toolkit_file_read_formats for details.
- allow_undefined_stereobool, default=False
If false, raises an exception if oemol contains undefined stereochemistry.
- Returns
- moleculesList[Molecule]
The list of
Molecule
objects in the file.
- Raises
- GAFFAtomTypeWarning
If the loaded mol2 file possibly uses GAFF atom types, which are not supported.
Examples
Load a mol2 file into an OpenFF
Molecule
object.>>> from openforcefield.utils import get_data_file_path >>> mol2_file_path = get_data_file_path('molecules/cyclohexane.mol2') >>> toolkit = OpenEyeToolkitWrapper() >>> molecule = toolkit.from_file(mol2_file_path, file_format='mol2')
-
from_file_obj
(file_obj, file_format, allow_undefined_stereo=False)[source]¶ Return an openforcefield.topology.Molecule from a file-like object (an object with a “.read()” method using this toolkit.
- Parameters
- file_objfile-like object
The file-like object to read the molecule from
- file_formatstr
Format specifier, usually file suffix (eg. ‘MOL2’, ‘SMI’) Note that not all toolkits support all formats. Check ToolkitWrapper.toolkit_file_read_formats for details.
- allow_undefined_stereobool, default=False
If false, raises an exception if oemol contains undefined stereochemistry.
- Returns
- moleculesList[Molecule]
The list of Molecule objects in the file object.
- Raises
- GAFFAtomTypeWarning
If the loaded mol2 file possibly uses GAFF atom types, which are not supported.
-
to_file_obj
(molecule, file_obj, file_format)[source]¶ Writes an OpenFF Molecule to a file-like object
- Parameters
- moleculean OpenFF Molecule
The molecule to write
- file_obj
The file-like object to write to
- file_format
The format for writing the molecule data
-
to_file
(molecule, file_path, file_format)[source]¶ Writes an OpenFF Molecule to a file-like object
- Parameters
- moleculean OpenFF Molecule
The molecule to write
- file_path
The file path to write to.
- file_format
The format for writing the molecule data
-
enumerate_protomers
(molecule, max_states=10)[source]¶ Enumerate the formal charges of a molecule to generate different protomoers.
- Parameters
- molecule: openforcefield.topology.Molecule
The molecule whose state we should enumerate
- max_states: int optional, default=10,
The maximum number of protomer states to be returned.
- Returns
- molecules: List[openforcefield.topology.Molecule],
A list of the protomers of the input molecules not including the input.
-
enumerate_stereoisomers
(molecule, undefined_only=False, max_isomers=20, rationalise=True)[source]¶ Enumerate the stereocenters and bonds of the current molecule.
- Parameters
- molecule: openforcefield.topology.Molecule
The molecule whose state we should enumerate
- undefined_only: bool optional, default=False
If we should enumerate all stereocenters and bonds or only those with undefined stereochemistry
- max_isomers: int optional, default=20
The maximum amount of molecules that should be returned
- rationalise: bool optional, default=True
If we should try to build and rationalise the molecule to ensure it can exist
- Returns
- molecules: List[openforcefield.topology.Molecule]
A list of openforcefield.topology.Molecule instances
-
enumerate_tautomers
(molecule, max_states=20)[source]¶ Enumerate the possible tautomers of the current molecule
- Parameters
- molecule: openforcefield.topology.Molecule
The molecule whose state we should enumerate
- max_states: int optional, default=20
The maximum amount of molecules that should be returned
- Returns
- molecules: List[openforcefield.topology.Molecule]
A list of openforcefield.topology.Molecule instances excluding the input molecule.
-
static
from_openeye
(oemol, allow_undefined_stereo=False)[source]¶ Create a Molecule from an OpenEye molecule. If the OpenEye molecule has implicit hydrogens, this function will make them explicit.
OEAtom
s have a different set of allowed value for partial charges thanopenforcefield.topology.Molecule
s. In the OpenEye toolkits, partial charges are stored on individualOEAtom
s, and their values are initialized to0.0
. In the Open Force Field Toolkit, anopenforcefield.topology.Molecule
’spartial_charges
attribute is initialized toNone
and can be set to asimtk.unit.Quantity
-wrapped numpy array with units of elementary charge. The Open Force Field Toolkit considers anOEMol
where everyOEAtom
has a partial charge offloat('nan')
to be equivalent to an Open Force Field Molecule’spartial_charges = None
. This assumption is made in bothto_openeye
andfrom_openeye
.Warning
This API is experimental and subject to change.
- Parameters
- oemolopeneye.oechem.OEMol
An OpenEye molecule
- allow_undefined_stereobool, default=False
If false, raises an exception if oemol contains undefined stereochemistry.
- Returns
- moleculeopenforcefield.topology.Molecule
An openforcefield molecule
Examples
Create a Molecule from an OpenEye OEMol
>>> from openeye import oechem >>> from openforcefield.tests.utils import get_data_file_path >>> ifs = oechem.oemolistream(get_data_file_path('systems/monomers/ethanol.mol2')) >>> oemols = list(ifs.GetOEGraphMols())
>>> toolkit_wrapper = OpenEyeToolkitWrapper() >>> molecule = toolkit_wrapper.from_openeye(oemols[0])
-
static
to_openeye
(molecule, aromaticity_model='OEAroModel_MDL')[source]¶ Create an OpenEye molecule using the specified aromaticity model
OEAtom
s have a different set of allowed value for partial charges thanopenforcefield.topology.Molecule
s. In the OpenEye toolkits, partial charges are stored on individualOEAtom
s, and their values are initialized to0.0
. In the Open Force Field Toolkit, anopenforcefield.topology.Molecule
’spartial_charges
attribute is initialized toNone
and can be set to asimtk.unit.Quantity
-wrapped numpy array with units of elementary charge. The Open Force Field Toolkit considers anOEMol
where everyOEAtom
has a partial charge offloat('nan')
to be equivalent to an Open Force Field Molecule’spartial_charges = None
. This assumption is made in bothto_openeye
andfrom_openeye
.Warning
This API is experimental and subject to change.
- Parameters
- moleculeopenforcefield.topology.molecule.Molecule object
The molecule to convert to an OEMol
- aromaticity_modelstr, optional, default=DEFAULT_AROMATICITY_MODEL
The aromaticity model to use
- Returns
- oemolopeneye.oechem.OEMol
An OpenEye molecule
Examples
Create an OpenEye molecule from a Molecule
>>> from openforcefield.topology import Molecule >>> toolkit_wrapper = OpenEyeToolkitWrapper() >>> molecule = Molecule.from_smiles('CC') >>> oemol = toolkit_wrapper.to_openeye(molecule)
-
to_smiles
(molecule, isomeric=True, explicit_hydrogens=True, mapped=False)[source]¶ Uses the OpenEye toolkit to convert a Molecule into a SMILES string. A partially mapped smiles can also be generated for atoms of interest by supplying an atom_map to the properties dictionary.
- Parameters
- moleculeAn openforcefield.topology.Molecule
The molecule to convert into a SMILES.
- isomeric: bool optional, default= True
return an isomeric smiles
- explicit_hydrogens: bool optional, default=True
return a smiles string containing all hydrogens explicitly
- mapped: bool optional, default=False
return a explicit hydrogen mapped smiles, the atoms to be mapped can be controlled by supplying an atom map into the properties dictionary. If no mapping is passed all atoms will be mapped in order, else an atom map dictionary from the current atom index to the map id should be supplied with no duplicates. The map ids (values) should start from 0 or 1.
- Returns
- smilesstr
The SMILES of the input molecule.
-
to_inchi
(molecule, fixed_hydrogens=False)[source]¶ Create an InChI string for the molecule using the RDKit Toolkit. InChI is a standardised representation that does not capture tautomers unless specified using the fixed hydrogen layer.
For information on InChi see here https://iupac.org/who-we-are/divisions/division-details/inchi/
- Parameters
- moleculeAn openforcefield.topology.Molecule
The molecule to convert into a SMILES.
- fixed_hydrogens: bool, default=False
If a fixed hydrogen layer should be added to the InChI, if True this will produce a non standard specific InChI string of the molecule.
- Returns
- inchi: str
The InChI string of the molecule.
-
to_inchikey
(molecule, fixed_hydrogens=False)[source]¶ Create an InChIKey for the molecule using the RDKit Toolkit. InChIKey is a standardised representation that does not capture tautomers unless specified using the fixed hydrogen layer.
For information on InChi see here https://iupac.org/who-we-are/divisions/division-details/inchi/
- Parameters
- moleculeAn openforcefield.topology.Molecule
The molecule to convert into a SMILES.
- fixed_hydrogens: bool, default=False
If a fixed hydrogen layer should be added to the InChI, if True this will produce a non standard specific InChI string of the molecule.
- Returns
- inchi_key: str
The InChIKey representation of the molecule.
-
to_iupac
(molecule)[source]¶ Generate IUPAC name from Molecule
- Parameters
- moleculeAn openforcefield.topology.Molecule
The molecule to convert into a SMILES.
- Returns
- iupac_namestr
IUPAC name of the molecule
Examples
>>> from openforcefield.topology import Molecule >>> from openforcefield.utils import get_data_file_path >>> sdf_filepath = get_data_file_path('molecules/ethanol.sdf') >>> molecule = Molecule(sdf_filepath) >>> toolkit = OpenEyeToolkitWrapper() >>> iupac_name = toolkit.to_iupac(molecule)
-
canonical_order_atoms
(molecule)[source]¶ Canonical order the atoms in the molecule using the OpenEye toolkit.
- Parameters
- molecule: openforcefield.topology.Molecule
The input molecule
- Returns
- moleculeopenforcefield.topology.Molecule
The input molecule, with canonically-indexed atoms and bonds.
-
from_smiles
(smiles, hydrogens_are_explicit=False, allow_undefined_stereo=False)[source]¶ Create a Molecule from a SMILES string using the OpenEye toolkit.
Warning
This API is experimental and subject to change.
- Parameters
- smilesstr
The SMILES string to turn into a molecule
- hydrogens_are_explicitbool, default = False
If False, OE will perform hydrogen addition using OEAddExplicitHydrogens
- allow_undefined_stereobool, default=False
Whether to accept SMILES with undefined stereochemistry. If False, an exception will be raised if a SMILES with undefined stereochemistry is passed into this function.
- Returns
- moleculeopenforcefield.topology.Molecule
An openforcefield-style molecule.
-
from_inchi
(inchi, allow_undefined_stereo=False)[source]¶ Construct a Molecule from a InChI representation
- Parameters
- inchistr
The InChI representation of the molecule.
- allow_undefined_stereobool, default=False
Whether to accept InChI with undefined stereochemistry. If False, an exception will be raised if a InChI with undefined stereochemistry is passed into this function.
- Returns
- moleculeopenforcefield.topology.Molecule
-
from_iupac
(iupac_name, allow_undefined_stereo=False, **kwargs)[source]¶ Construct a Molecule from an IUPAC name
- Parameters
- iupac_namestr
The IUPAC or common name of the molecule.
- allow_undefined_stereobool, default=False
Whether to accept a molecule name with undefined stereochemistry. If False, an exception will be raised if a molecule name with undefined stereochemistry is passed into this function.
- Returns
- moleculeopenforcefield.topology.Molecule
-
generate_conformers
(molecule, n_conformers=1, rms_cutoff=None, clear_existing=True)[source]¶ Generate molecule conformers using OpenEye Omega.
Warning
This API is experimental and subject to change.
- moleculea
Molecule
The molecule to generate conformers for.
- n_conformersint, default=1
The maximum number of conformers to generate.
- rms_cutoffsimtk.Quantity-wrapped float, in units of distance, optional, default=None
The minimum RMS value at which two conformers are considered redundant and one is deleted. If None, the cutoff is set to 1 Angstrom
- clear_existingbool, default=True
Whether to overwrite existing conformers for the molecule
- moleculea
-
assign_partial_charges
(molecule, partial_charge_method=None, use_conformers=None, strict_n_conformers=False)[source]¶ Compute partial charges with OpenEye quacpac, and assign the new values to the partial_charges attribute.
Warning
This API is experimental and subject to change.
- Parameters
- moleculeopenforcefield.topology.Molecule
Molecule for which partial charges are to be computed
- partial_charge_methodstr, optional, default=None
The charge model to use. One of [‘amberff94’, ‘mmff’, ‘mmff94’, am1-mulliken, ‘am1bcc’, ‘am1bccnosymspt’, ‘am1bccelf10’] If None, ‘am1-mulliken’ will be used.
- use_conformersiterable of simtk.unit.Quantity-wrapped numpy arrays, each with shape (n_atoms, 3) and dimension of distance. Optional, default = None
Coordinates to use for partial charge calculation. If None, an appropriate number of conformers will be generated.
- strict_n_conformersbool, default=False
Whether to raise an exception if an invalid number of conformers is provided for the given charge method. If this is False and an invalid number of conformers is found, a warning will be raised.
- Raises
- ChargeMethodUnavailableError if the requested charge method can not be handled by this toolkit
- ChargeCalculationError if the charge method is supported by this toolkit, but fails
-
compute_partial_charges_am1bcc
(molecule, use_conformers=None, strict_n_conformers=False)[source]¶ Compute AM1BCC partial charges with OpenEye quacpac. This function will attempt to use the OEAM1BCCELF10 charge generation method, but may print a warning and fall back to normal OEAM1BCC if an error is encountered. This error is known to occur with some carboxylic acids, and is under investigation by OpenEye.
Warning
This API is experimental and subject to change.
- Parameters
- moleculeMolecule
Molecule for which partial charges are to be computed
- use_conformersiterable of simtk.unit.Quantity-wrapped numpy arrays, each with shape (n_atoms, 3) and dimension of distance. Optional, default = None
Coordinates to use for partial charge calculation. If None, an appropriate number of conformers will be generated.
- strict_n_conformersbool, default=False
Whether to raise an exception if an invalid number of conformers is provided. If this is False and an invalid number of conformers is found, a warning will be raised instead of an Exception.
- Returns
- chargesnumpy.array of shape (natoms) of type float
The partial charges
-
assign_fractional_bond_orders
(molecule, bond_order_model=None, use_conformers=None)[source]¶ Update and store list of bond orders this molecule. Bond orders are stored on each bond, in the bond.fractional_bond_order attribute.
Warning
This API is experimental and subject to change.
- Parameters
- moleculeopenforcefield.topology.molecule Molecule
The molecule to assign wiberg bond orders to
- bond_order_modelstr, optional, default=None
The charge model to use. One of [‘am1-wiberg’, ‘pm3-wiberg’]. If None, ‘am1-wiberg’ will be used.
- use_conformersiterable of simtk.unit.Quantity(np.array) with shape (n_atoms, 3) and dimension of distance, optional, default=None
The conformers to use for fractional bond order calculation. If None, an appropriate number of conformers will be generated by an available ToolkitWrapper.
-
get_tagged_smarts_connectivity
(smarts)[source]¶ Returns a tuple of tuples indicating connectivity between tagged atoms in a SMARTS string. Does not return bond order.
- Parameters
- smartsstr
The tagged SMARTS to analyze
- Returns
- unique_tagstuple of int
A sorted tuple of all unique tagged atom map indices.
- tagged_atom_connectivitytuple of tuples of int, shape n_tagged_bonds x 2
A tuple of tuples, where each inner tuple is a pair of tagged atoms (tag_idx_1, tag_idx_2) which are bonded. The inner tuples are ordered smallest-to-largest, and the tuple of tuples is ordered lexically. So the return value for an improper torsion would be ((1, 2), (2, 3), (2, 4)).
- Raises
- SMIRKSParsingError
If OpenEye toolkit was unable to parse the provided smirks/tagged smarts
-
find_smarts_matches
(molecule, smarts, aromaticity_model='OEAroModel_MDL')[source]¶ Find all SMARTS matches for the specified molecule, using the specified aromaticity model.
Warning
This API is experimental and subject to change.
- Parameters
- moleculeopenforcefield.topology.Molecule
The molecule for which all specified SMARTS matches are to be located
- smartsstr
SMARTS string with optional SMIRKS-style atom tagging
- aromaticity_modelstr, optional, default=’OEAroModel_MDL’
Molecule is prepared with this aromaticity model prior to querying.
- .. note :: Currently, the only supported ``aromaticity_model`` is ``OEAroModel_MDL``
-
property
toolkit_file_read_formats
¶ List of file formats that this toolkit can read.
-
property
toolkit_file_write_formats
¶ List of file formats that this toolkit can write.
-
property
toolkit_installation_instructions
¶ classmethod(function) -> method
Convert a function to be a class method.
A class method receives the class as implicit first argument, just like an instance method receives the instance. To declare a class method, use this idiom:
- class C:
@classmethod def f(cls, arg1, arg2, …):
…
It can be called either on the class (e.g. C.f()) or on an instance (e.g. C().f()). The instance is ignored except for its class. If a class method is called for a derived class, the derived class object is passed as the implied first argument.
Class methods are different than C++ or Java static methods. If you want those, see the staticmethod builtin.
-
property
toolkit_name
¶ Return the name of the toolkit wrapped by this class as a str
Warning
This API is experimental and subject to change.
- Returns
- toolkit_namestr
The name of the wrapped toolkit
-
property
toolkit_version
¶ Return the version of the wrapped toolkit as a str
Warning
This API is experimental and subject to change.
- Returns
- toolkit_versionstr
The version of the wrapped toolkit