set_tag
Description:
Sets the tag for this.
The tag can be used to retrieve the page with [method@NavigationView.find_page], as well as with [method@NavigationView.push_by_tag], [ method@NavigationView.pop_to_tag] or [method@NavigationView.replace_with_tags].
Tags must be unique within each [class@NavigationView].
The tag also must be set to use the `navigation.push` action.
Parameters:
| this |
a navigation page |
| tag |
the page tag |