Insert a pane into the paned window at a specified zero based index or
before another pane id. When adding a pane to the paned window for the
first time the pane gains an id that is equal to the passed widget's id
and can be used later to refer to the new pane. If the id of the widget
passed is already used as a pane id then that existing one will be moved
to the new position.
Insert a pane into the paned window at a specified zero based index or before another pane id. When adding a pane to the paned window for the first time the pane gains an id that is equal to the passed widget's id and can be used later to refer to the new pane. If the id of the widget passed is already used as a pane id then that existing one will be moved to the new position.