Retrieves the translation transformation of the given child GtkWidget in the GtkFixed.
See also: [method@Gtk.Fixed.get_child_transform].
a child of @fixed
the horizontal position of the @widget
the vertical position of the @widget
See Implementation
Retrieves the translation transformation of the given child GtkWidget in the GtkFixed.
See also: [method@Gtk.Fixed.get_child_transform].