Cancels a running print operation.
This function may be called from a [signal@Gtk.PrintOperation:GtkPrintOperation:begin-print], [signal@Gtk.PrintOperation:
GtkPrintOperation:paginate] or [signal@Gtk.PrintOperation:GtkPrintOperation:draw-page] signal handler to stop
the currently running print operation.
| this |
a `GtkPrintOperation` |