[jira] [Created] (ARROW-16222) [JS] Allow appending null on sparse union and map builders

[Dominik Moritz (Jira)]

Dominik Moritz created ARROW-16222:
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             Summary: [JS] Allow appending null on sparse union and map builders
                 Key: ARROW-16222
                 URL: https://issues.apache.org/jira/browse/ARROW-16222
             Project: Apache Arrow
          Issue Type: Bug
          Components: JavaScript
            Reporter: Dominik Moritz


See https://github.com/apache/arrow/pull/12451 and in particular 
https://github.com/apache/arrow/pull/12451#pullrequestreview-887789954. 



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