Event::GetMetaKey(PRBool *aMetaKey)  {      return NS_ERROR_NOT_IMPLEMENTED;  }    /* void initKeyEvent (in DOMString typeArg, in boolean canBubbleArg, in boolean cancelableArg, in nsIDOMAbstractView viewArg, in boolean ctrlKeyArg, in boolean altKeyArg, in boolean shiftKeyArg, in boolean metaKeyArg, in unsigned long keyCodeArg, in unsigned long charCodeArg); */  