anchor.diff:              bubbles,
               cancelable,
               currentTarget,
  -            _defaultPrevented,
  -            _preventDefault,
  +            defaultPrevented,
  +            preventDefault,
               stopPropagation,
               eventPhase,
               isTrusted,
  
positive.code:             bubbles,
              cancelable,
              currentTarget,
              _defaultPrevented,
              _preventDefault,
              stopPropagation,
              eventPhase,
              isTrusted,
  
negative.code:     bool bubbles,
      bool cancelable,
      bool currentTarget,
      bool defaultPrevented,
      dynamic preventDefault,
      dynamic stopPropagation,
      num eventPhase,
      bool isTrusted,
  