Inserts a non-pinned page at @position.
It's an error to try to insert a page before a pinned page, in that case [method@TabView.insert_pinned] should be used instead.
a widget to add
the position to add @child at, starting from 0
the page object representing @child
1.0
See Implementation
Inserts a non-pinned page at @position.
It's an error to try to insert a page before a pinned page, in that case [method@TabView.insert_pinned] should be used instead.