static const nsIID& GetIID() { static nsIID iid = NS_TEXT_ENCODER_CID; return iid; }
static const nsIID& GetIID() { static nsIID iid = NS_IDOCUMENT_ENCODER_IID; return iid; }
  static const nsIID& GetIID() { static nsIID iid = NS_TEXT_ENCODER_CID; return iid; }