import 'dart:typed_data'; class TextureRgbaRenderer { Future<int> createTexture(int key) { throw UnimplementedError(); } Future<bool> closeTexture(int key) { return Future(() => true); } Future<bool> onRgba( int key, Uint8List data, int height, int width, int strideAlign) { throw UnimplementedError(); } Future<int> getTexturePtr(int key) { throw UnimplementedError(); } }