PropertiedPropertiedTrackImplemented by PropertiedClassPropertiespropertiesMethodspropertysetValuevaluepropertiesproperties: Property[]propertyproperty(key: string): undefined | PropertyParameterkey: stringReturns undefined | PropertysetValuesetValue(key: string, value: SelectionValue): booleanParameterskey: stringvalue: SelectionValueReturns booleanvaluevalue(key: string): SelectionValueParameterkey: stringReturns SelectionValue