Inserts widget into the child widget list of parent.
It will be placed before next_sibling, or at the end if next_sibling is null.
After calling this function, gtk_widget_get_next_sibling(widget) will return next_sibling.
If parent is already set as the parent widget of widget, this function can also be used to reorder widget in the child widget list of parent.
This API is primarily meant for widget implementations; if you are just using a widget, you *must* use its own API for adding children.
the parent gtk.widget.Widget to insert widget into
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 next_sibling is null.
After calling this function, gtk_widget_get_next_sibling(widget) will return next_sibling.
If parent is already set as the parent widget of widget, this function can also be used to reorder widget in the child widget list of parent.
This API is primarily meant for widget implementations; if you are just using a widget, you *must* use its own API for adding children.