returns the result of interpreting the object as an instance of ` property type ' . this implementation returns null ; returning a non-null result will terminate the switch . concode_field_sep ModelPackage modelPackage concode_field_sep T caseModelProperty concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T caseModelObject concode_elem_sep T caseModelPropertyCategory concode_elem_sep T caseModel concode_elem_sep T caseModelPropertyMapEntry concode_elem_sep T defaultCase
T function ( ModelPropertyType arg0 ) { return null ; }