code: func (v *MenuItem) SetLabel(label string) {
  	cstr1 := (*C.gchar)(C.CString(label))
  	defer C.free(unsafe.Pointer(cstr1))
  
  	C.g_menu_item_set_label(v.native(), cstr1)
  }
docs: //SetLabel is a wrapper around g_menu_item_set_label().