Gets the `PangoLayout` used to display the label.
The layout is useful to e.g. convert text positions to pixel positions, in combination with [[email protected]_layout_offsets]. The
returned layout is owned by the label so need not be freed by the caller. The label is free to recreate its
layout at any time, so it should be considered read-only.
| this |
a `GtkLabel` |
|
the [[email protected]] for this label |