public CoderResult unmappableResult(){
  assert (error == null);
  return CoderResult.unmappableForLength(isPair ? 2 : 1);
}

public CoderResult unmappableResult ( ) { assert ( error == null ) ; return CoderResult . unmappableForLength ( isPair ? 2 : 1 ) ; }
returns an unmappable - input result object , with the appropriate input length , for the previously - parsed character .
