Returns the index into the list of siblings for the element at pos as returned by gtk.widget_path.WidgetPath.iterGetSiblings. If that function would return null because the element at pos has no siblings, this function will return 0.
position to get the sibling index for, -1 for the path head
0 or the index into the list of siblings for the element at pos.
Returns the index into the list of siblings for the element at pos as returned by gtk.widget_path.WidgetPath.iterGetSiblings. If that function would return null because the element at pos has no siblings, this function will return 0.