anchor.diff:      FOR_CONTAINMENT;
       FOR_ITERATOR;
       FOR_STMT;
  -    FORMAL_PARAMETER;
  -    FORMAL_PARAMETER_LIST;
  +    PARAM_NAME;
  +    PARAM;
  +    PARAM_LIST;
       IF_FALSE;
       IF_STMT;
       IF_TRUE;
  
positive.code:     ANNOTATION_LIST;
      ALIAS_DECL;
      ANNOTATION_NAME;
      ARG_NAME;
      ATTRIBUTE_ARG;
      ATTRIBUTE_DECL;
      ATTRIBUTE_GETTER;
  
negative.code: 
  parameterName
      : LIDENTIFIER
      -> ^(PARAM_NAME LIDENTIFIER)
      ;
  
  namedArguments
  