use reflection to invoke a static method for a class object and method name concode_field_sep PlaceHolder placeHolder concode_field_sep T tryInvokeInstance concode_elem_sep T helper
T function ( final Class < ? > arg0 , final String arg1 , final Class < ? > [ ] arg2 , final Object [ ] arg3 ) { return ( T ) helper ( null , arg0 , null , arg1 , arg2 , arg3 ) ; }