anchor.diff:          | "final"
           | "finally"
           | "for"
  +        | "goto"
           | "if"
           | "implements"
           | "import"
  
positive.code:         | "try"
          | "volatile"
          | "while"
          |   "goto"
          |   "do"
          |   builtInType
          )
          { #keywordPropertyNames.setType(IDENT); }
  
negative.code:         | "continue"
          | "def"
          | "default"
          | "do"
          | "else"
          | "enum"
          | "extends"
  