Constructs a child of a buildable that has been
specified as “constructor” in the UI definition. This can be used to
reference a widget created in a <ui> tag which is outside
of the normal GtkBuilder UI definition hierarchy. A reference to the
constructed object is returned and becomes owned by the caller.
Constructs a child of a buildable that has been specified as “constructor” in the UI definition. This can be used to reference a widget created in a <ui> tag which is outside of the normal GtkBuilder UI definition hierarchy. A reference to the constructed object is returned and becomes owned by the caller.