question: convenience method for creating an async result . concode_field_sep T result concode_elem_sep Throwable error concode_field_sep Throwable getError concode_elem_sep boolean isError concode_elem_sep T getResult concode_elem_sep boolean isSuccess
target: AsyncResultImpl < T > function ( T arg0 , Class < T > arg1 ) { return new AsyncResultImpl < > ( arg0 ) ; }