checks that the specified object is null . if it is not an invalidrequestexception will be throws . concode_field_sep PlaceHolder placeHolder concode_field_sep InvalidRequestException invalidRequest concode_elem_sep T checkNotNull concode_elem_sep void checkTrue concode_elem_sep void checkTrue concode_elem_sep void checkContainsOnly concode_elem_sep void checkFalse concode_elem_sep void checkFalse concode_elem_sep void checkContainsNoDuplicates concode_elem_sep void checkBindValueSet
T function ( T arg0 , String arg1 , Object ... arg2 ) { checkTrue ( arg0 == null , arg1 , arg2 ) ; return arg0 ; }