pub unsafe extern "C" fn gtk_tree_drag_source_row_draggable(
drag_source: *mut GtkTreeDragSource,
path: *mut GtkTreePath,
) -> gboolean
pub unsafe extern "C" fn gtk_tree_drag_source_row_draggable(
drag_source: *mut GtkTreeDragSource,
path: *mut GtkTreePath,
) -> gboolean