remove method

@override dynamic remove(dynamic key)

If isImmutable is false, or the key already exists, then allow the removal. Throw JsonObjectLiteException if we're not allowed to remove a key

Implementation

@override
dynamic remove(dynamic key) {
  if (isImmutable == false || containsKey(key)) {
    return _objectData.remove(key);
  } else {
    throw const JsonObjectLiteException('JsonObject is not extendable');
  }
}