returns the result of interpretting the object as an instance of ` scene type ' . this implementation returns null ; returning a non-null result will terminate the switch . concode_field_sep PlayPackage modelPackage concode_field_sep T casePlayType concode_elem_sep T caseSpeechType concode_elem_sep T caseActType concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T caseDocumentRoot concode_elem_sep T casePersonaGroupType concode_elem_sep T caseFmType concode_elem_sep T defaultCase concode_elem_sep T casePersonaeType
T function ( SceneType arg0 ) { return null ; }