code: func (v *ButtonBox) GetChildNonHomogeneous(child IWidget) bool {
  	c := C.gtk_button_box_get_child_non_homogeneous(v.native(), child.toWidget())
  	return gobool(c)
  }
docs: // GetChildNonHomogeneous() is a wrapper around gtk_button_box_get_child_non_homogeneous().