yyy1000 commented on PR #24773:
URL: https://github.com/apache/beam/pull/24773#issuecomment-1374317578

   > Suppose a={1, null}, b={2, null} so they have same size, previously a != b 
but now a equals b because value and otherValue are both null.
   > 
   > This is not get caught by unit test so we need to improve our test imo.
   
   Sorry for missing that.
   I think there are no duplicated null checks in the code now, so maybe no 
changes could be made for that. :)
   We can close this PR and the original issue.
   Should I add a unit test for " a={1, null}, b={2, null} " or no need?
   
   


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