insertBefore
Inserts @widget into the child widget list of @parent.
It will be placed before @next_sibling, or at the end if
Parameters
parent
the parent GtkWidget to insert @widget into
nextSibling
the new next sibling of @widget
Inserts @widget into the child widget list of @parent.
It will be placed before @next_sibling, or at the end if
the parent GtkWidget to insert @widget into
the new next sibling of @widget