addStyleLayer method Null safety

Future<void> addStyleLayer(
  1. String arg_properties,
  2. LayerPosition? arg_layerPosition
)

Adds a new style layer.

Runtime style layers are valid until they are either removed or a new style is loaded.

@param properties A map of style layer properties. @param layerPosition If not empty, the new layer will be positioned according to layer position parameters.

@return A string describing an error if the operation was not successful, or empty otherwise.

Implementation

Future<void> addStyleLayer(
    String arg_properties, LayerPosition? arg_layerPosition) async {
  final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
      'dev.flutter.pigeon.mapbox_maps_flutter.StyleManager.addStyleLayer',
      codec,
      binaryMessenger: _binaryMessenger);
  final List<Object?>? replyList = await channel
      .send(<Object?>[arg_properties, arg_layerPosition]) as List<Object?>?;
  if (replyList == null) {
    throw PlatformException(
      code: 'channel-error',
      message: 'Unable to establish connection on channel.',
    );
  } else if (replyList.length > 1) {
    throw PlatformException(
      code: replyList[0]! as String,
      message: replyList[1] as String?,
      details: replyList[2],
    );
  } else {
    return;
  }
}