[jira] [Created] (ARROW-7848) Add doc for MapType

[Shawn Yang (Jira)]

Shawn Yang created ARROW-7848:
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             Summary: Add doc for MapType
                 Key: ARROW-7848
                 URL: https://issues.apache.org/jira/browse/ARROW-7848
             Project: Apache Arrow
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 0.15.1, 0.16.0, 0.15.0
            Reporter: Shawn Yang
             Fix For: 0.15.1, 0.16.0, 0.15.0


MapType added in 0.15 doesn't update doc.



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