pub trait CellLayoutExt: 'static {
fn add_attribute<P: IsA<CellRenderer>>(
&self,
cell: &P,
attribute: &str,
column: i32
);
fn clear(&self);
fn clear_attributes<P: IsA<CellRenderer>>(&self, cell: &P);
fn area(&self) -> Option<CellArea>;
fn cells(&self) -> Vec<CellRenderer>;
fn pack_end<P: IsA<CellRenderer>>(&self, cell: &P, expand: bool);
fn pack_start<P: IsA<CellRenderer>>(&self, cell: &P, expand: bool);
fn reorder<P: IsA<CellRenderer>>(&self, cell: &P, position: i32);
fn set_cell_data_func<P: IsA<CellRenderer>>(
&self,
cell: &P,
func: Option<Box_<dyn Fn(&CellLayout, &CellRenderer, &TreeModel, &TreeIter) + 'static>>
);
}