Gets the layout currently being rendered using renderer.
Calling this function only makes sense from inside a subclass's methods, like in its draw_shape vfunc, for example.
The returned layout should not be modified while still being rendered.
the layout, or null if no layout is being rendered using renderer at this time.
Gets the layout currently being rendered using renderer.
Calling this function only makes sense from inside a subclass's methods, like in its draw_shape vfunc, for example.
The returned layout should not be modified while still being rendered.