anchor.diff:      ;
   
   annotationTypeElementRest
  -    :   typeType annotationMethodOrConstantRest ';'
  +    :   type_ annotationMethodOrConstantRest ';'
       |   classDeclaration ';'?
       |   interfaceDeclaration ';'?
       |   enumDeclaration ';'?
  
positive.code:    for invalid return type after parsing.
   */
  methodDeclaration
      :   OVERRIDE? (typeType|VOID) Identifier formalParameters ('[' ']')*
          (THROWS qualifiedNameList)?
          (   methodBody
          |   ';'
  
negative.code:     |   expression '[' expression ']'
      |   expression '(' expressionList? ')'
      |   NEW creator
      |   '(' type_ ')' expression
      |   expression ('++' | '--')
      |   ('+'|'-'|'++'|'--') expression
      |   ('~'|'!') expression
  