[ Version ( since = "1.5" ) ]
public void insert_overlay_layer_above (Layer layer, Layer sibling)
Inserts a map layer as an overlay on top of the base map.
The layer will appear above sibling, or at the bottom (but still above the base map) if sibling is
null.
| this |
a [class@SimpleMap] |
| layer |
a [class@Layer] to insert |