if (mSheets) { mSheets->AppendElement(aStyleSheet); } return result;
return NS_OK;
CSSRuleProcessor::AppendStyleSheet(nsICSSStyleSheet* aStyleSheet){  nsresult result = NS_OK;  if (! mSheets) {    result = NS_NewISupportsArray(&mSheets);  }  if (mSheets) {    mSheets->AppendElement(aStyleSheet);  }  return result;}