Gets the gtk.tree_view_column.TreeViewColumn at the given position in the #tree_view.
The position of the column, counting from 0.
The gtk.tree_view_column.TreeViewColumn, or null if the position is outside the range of columns.
Deprecated: Use gtk.list_view.ListView or gtk.column_view.ColumnView instead
Gets the gtk.tree_view_column.TreeViewColumn at the given position in the #tree_view.