fromJson static method

Row? fromJson(dynamic value)

Returns a new Row instance and imports its values from value if it's a Map, null otherwise.

Implementation

// ignore: prefer_constructors_over_static_methods
static Row? fromJson(dynamic value) {
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      assert(json.containsKey(r'index'), 'Required key "Row[index]" is missing from JSON.');
      assert(json[r'index'] != null, 'Required key "Row[index]" has a null value in JSON.');
      assert(json.containsKey(r'cells'), 'Required key "Row[cells]" is missing from JSON.');
      assert(json[r'cells'] != null, 'Required key "Row[cells]" has a null value in JSON.');
      return true;
    }());

    return Row(
      index: mapValueOfType<int>(json, r'index')!,
      cells: mapCastOfType<String, Object>(json, r'cells')!,
    );
  }
  return null;
}