anchor.diff:          | "enum"
           | "extends"
           | "false"
  +        | "final"
           | "finally"
           | "for"
           | "if"
  
positive.code:  */
  keywordPropertyNames
      :   (
            "as"
          | "assert"
          | "break"
          | "case"
  
negative.code:         | "public"
          | "return"
          | "static"
          | "strictfp"
          | "switch"
          | "synchronized"
          | "threadsafe"
  