Gets the layout line currently being rendered using renderer.
Calling this function only makes sense from inside a subclass's
methods, like in its draw_shape<!---->() for example.
The returned layout line should not be modified while still being
rendered.
Gets the layout line currently being rendered using renderer. Calling this function only makes sense from inside a subclass's methods, like in its draw_shape<!---->() for example.
The returned layout line should not be modified while still being rendered.