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