set_focusable

Sets this to be focusable.

If a row is focusable, it can be focused using the keyboard. This works similar to [method@Gtk.Widget.set_focusable].

Note that if row are not focusable, the contents of cells can still be focused if they are focusable.

By default, rows are focusable.

Parameters:

this	a `GtkColumnViewRow`
focusable	if the row should be focusable