Method sprite

src/app/ui/editor/tool_loop_impl.cpp:195–195

  Brush* getBrush() override { return m_brush.get(); }
  Document* getDocument() override { return m_document; }
  Sprite* sprite() override { return m_sprite; }
  Layer* getLayer() override { return m_layer; }
  frame_t getFrame() override { return m_frame; }
  RgbMap* getRgbMap() override {