anchor.diff:          ShadowPropertyAssign,
           ShadowPropertyGet,
           ShadowRedirectingInitializer,
  -        ShadowRethrow,
           ShadowReturnStatement,
           ShadowStaticAssignment,
           ShadowStaticGet,
  
positive.code:         ReturnStatement,
          Statement,
          StaticGet,
          StaticInvocation,
          StaticSet,
          StringConcatenation,
          SuperInitializer,
  
negative.code:         ShadowSuperPropertyGet,
          ShadowSwitchStatement,
          ShadowSyntheticExpression,
          ShadowTryCatch,
          ShadowTryFinally,
          ShadowVariableAssignment,
  