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