anchor.diff:  
                 teardown(Ch,
                          [{?TEST_X, 1}],
  -                       [],
                          ["3_shard"])
         end).
   
  
positive.code: 
                teardown(Ch,
                         [{?TEST_X, 5}],
                         [],
                         ["3_shard"])
        end).
  
  
negative.code: 
                teardown(Ch,
                         [{?TEST_X, 1}],
                         ["rkey"])
        end).
  
  