mBindingTable = new nsSupportsHashtable();
mBindingTable = new nsObjectHashtable(nsnull, nsnull, DeletePrototypeBinding, nsnull);
nsXBLDocumentInfo::SetPrototypeBinding(const nsCString& aRef, nsIXBLPrototypeBinding* aBinding){  if (!mBindingTable)    mBindingTable = new nsSupportsHashtable();  nsCStringKey key(aRef);  mBindingTable->Put(&key, aBinding);  return NS_OK;}