if (nsnull != mRule) {
if (mRule) {
DOMCSSDeclarationImpl::GetCSSDeclaration(nsCSSDeclaration **aDecl,                                             PRBool aAllocate){  if (nsnull != mRule) {    *aDecl = mRule->GetDeclaration();  }  else {    *aDecl = nsnull;  }  return NS_OK;}