if (mMediumCascadeTable) { mMediumCascadeTable->Enumerate(DeleteRuleCascade, nsnull); delete mMediumCascadeTable; mMediumCascadeTable = nsnull;
if (mRuleProcessors) { mRuleProcessors->EnumerateForwards(EnumClearRuleCascades, nsnull);
CSSRuleProcessor::ClearRuleCascades(void){  if (mMediumCascadeTable) {    mMediumCascadeTable->Enumerate(DeleteRuleCascade, nsnull);    delete mMediumCascadeTable;    mMediumCascadeTable = nsnull;  }  return NS_OK;}