get_expander_column

Description:

public unowned TreeViewColumn? get_expander_column ()

Returns the column that is the current expander column, or null if none has been set.

Note:

Use [class@Gtk.ListView] or [class@Gtk.ColumnView] instead

This column has the expander arrow drawn next to it.

Parameters:

this

A `GtkTreeView`

Returns:

The expander column.