NS_IMETHODIMP nsPref::CopyDefaultUnicharPref(const char *pref, PRUnichar **_retval)
NS_IMETHODIMP nsPref::CopyDefaultUnicharPref( const char *pref, PRUnichar ** return_buf)
NS_IMETHODIMP nsPref::CopyDefaultUnicharPref(const char *pref, PRUnichar **_retval){  nsresult rv;  nsCOMPtr<nsISupportsWString> theString;  rv = mDefaultBranch->GetComplexValue(pref, NS_GET_IID(nsISupportsWString),                                       getter_AddRefs(theString));  if (NS_SUCCEEDED(rv)) {    rv = theString->GetData(_retval);  }  return rv;}