add_titled

Description:

public unowned StackPage add_titled (Widget child, string? name, string title)

Adds a child to this.

The child is identified by the name. The title will be used by `GtkStackSwitcher` to represent child in a tab bar, so it should be short.

this	a `GtkStack`
child	the widget to add
name	the name for `child`
title	a human-readable title for `child`

the `GtkStackPage` for child