NS_IMETHODIMP nsMetaCharsetObserver::Observe(nsISupports*, const PRUnichar*, const PRUnichar*)
NS_IMETHODIMP nsMetaCharsetObserver::Observe(nsISupports *aSubject, const char *aTopic, const PRUnichar *aData)
NS_IMETHODIMP nsMetaCharsetObserver::Observe(nsISupports*, const PRUnichar*, const PRUnichar*){    return NS_ERROR_NOT_IMPLEMENTED;}                                                  