returns the result of interpreting the object as an instance of ` typed element ' . this implementation returns null ; returning a non-null result will terminate the switch . concode_field_sep QueryPackage modelPackage concode_field_sep T caseOqlQuery concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T caseSelection concode_elem_sep T caseFromClause concode_elem_sep T caseExpression concode_elem_sep T caseObjectBasedExpression concode_elem_sep T caseInScope concode_elem_sep T defaultCase
T function ( TypedElement arg0 ) { return null ; }