changed property

@override bool get changed

determina si hay cambios

Implementation

@override
bool get changed {
  var r = false;
  //  realiza la comparacion
  if (original.length == _data.length) {
    for (var i = 0; i < length; i++) {
      if (!equal(original[i], _data[i])) {
        r = true;
      }
    }
  } else {
    r = true;
  }
  return r;
}