anchor.diff:              ]
   
       let DOMTokenList =
  -        Class "DOMTokenList"
  +        DOMClass "TokenList"
           |+> Instance [
               "length" =? T<int>
               "item" => T<int> ^-> T<string>
  
positive.code:         |> P.EnumInlines name
  
      let DOMExceptionType =
          Enum "DOMExceptionType" "DOMException." "_ERR" "\
              INDEX_SIZE_ERR DOMSTRING_SIZE_ERR HIERARCHY_REQUEST_ERR
              WRONG_DOCUMENT_ERR INVALID_CHARACTER_ERR NO_DATA_ALLOWED_ERR \
              NO_MODIFICATION_ALLOWED_ERR NOT_FOUND_ERR NOT_SUPPORTED_ERR \
  
negative.code:     let NamedNodeMap = Class "NamedNodeMap"
      let Element = Class "Element"
      let TypeInfo = Class "TypeInfo"
      let Event = Class "Event"
      let AbstractView = Class "AbstractView"
      let NodeFilter = Class "NodeFilter"
  