Removes a child from self.
The child must have been added with adw.header_bar.HeaderBar.packStart, adw.header_bar.HeaderBar.packEnd or propertyHeaderBar:title-widget.
the child to remove
Removes a child from self.
The child must have been added with adw.header_bar.HeaderBar.packStart, adw.header_bar.HeaderBar.packEnd or propertyHeaderBar:title-widget.