This should be implemented to handle changes in child cell properties for a given gtk.cell_renderer.CellRenderer that were previously installed on the gtk.cell_area_class.CellAreaClass with gtk.cell_area_class.CellAreaClass.installCellProperty.
This should be implemented to handle changes in child cell properties for a given gtk.cell_renderer.CellRenderer that were previously installed on the gtk.cell_area_class.CellAreaClass with gtk.cell_area_class.CellAreaClass.installCellProperty.