if (PR_FALSE == mChildGroupList.RemoveElement(aGroup)) { rv = NS_ERROR_FAILURE;
if (NS_SUCCEEDED(rv)) { mChildList->RemoveElement((nsIDocumentLoader*)aLoader);
nsDocLoaderImpl::RemoveChildGroup(nsILoadGroup* aGroup){  nsresult rv = NS_OK;  if (PR_FALSE == mChildGroupList.RemoveElement(aGroup)) {    rv = NS_ERROR_FAILURE;  }  return rv;}