[ Version ( since = "1.10" ) ]
public void set_child_above_sibling (Actor child, Actor? sibling)
Sets child to be above sibling in the list of children of this.
If sibling is null, child will be the new last child of this.
This function is logically equivalent to removing child and using
insert_child_above, but it will not emit signals or change state on
child.
| this |
a Actor |
| child |
a Actor child of this |
| sibling |
a Actor child of this, or |