public static void SP_trigger_key(Entity self) {
    if (GameBase.st.item == null) {
      ServerGame.PF_dprintf("no key item for trigger_key at " + Lib.vtos(self.s.origin) + "\n");
      return;
    }
    self.item = GameItems.FindItemByClassname(GameBase.st.item);

    if (null == self.item) {
      ServerGame.PF_dprintf(
          "item "
              + GameBase.st.item
              + " not found for trigger_key at "
              + Lib.vtos(self.s.origin)
              + "\n");
      return;
    }

    if (self.target == null) {
      ServerGame.PF_dprintf(self.classname + " at " + Lib.vtos(self.s.origin) + " has no target\n");
      return;
    }

    ServerInit.SV_SoundIndex("misc/keytry.wav");
    ServerInit.SV_SoundIndex("misc/keyuse.wav");

    self.use = trigger_key_use;
  }