question: returns the result of interpreting the object as an instance of ` element ' . this implementation returns null ; returning a non-null result will terminate the switch . concode_field_sep CrossContainmentPackage modelPackage concode_field_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T defaultCase
target: T function ( Element arg0 ) { return null ; }