Warning: CellEditable is deprecated since 4.10.
Interface for widgets that can be used for editing cells
List views use widgets for displaying their contents. See [iface@Gtk.Editable] for editable text widgets
The `GtkCellEditable` interface must be implemented for widgets to be usable to edit the contents of a `GtkTreeView` cell. It provides a way to specify how temporary widgets should be configured for editing, get the new value, etc.