T function ( Student arg0 ) { return null ; }
returns the result of interpreting the object as an instance of ` student ' . this implementation returns null ; returning a non-null result will terminate the switch . concode_field_sep AssociationoverridePackage modelPackage concode_field_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T caseEmployee concode_elem_sep T casePerson concode_elem_sep T caseAddress concode_elem_sep T defaultCase