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