Method IsGroup

src/game/map/render_layer.h:74–74

	virtual bool DoRender(const CRenderLayerParams &Params) = 0;
	virtual bool IsValid() const { return true; }
	virtual bool IsGroup() const { return false; }
	virtual void Unload() = 0;

	bool IsVisibleInClipRegion(const std::optional<CClipRegion> &ClipRegion) const;