Kouhei Sutou created ARROW-8140:
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Summary: [Developer] Follow NullType -> NullField change
Key: ARROW-8140
URL: https://issues.apache.org/jira/browse/ARROW-8140
Project: Apache Arrow
Issue Type: Improvement
Components: Developer Tools
Reporter: Kouhei Sutou
Assignee: Kouhei Sutou
The lint CI job is failed since ARROW-8101 merge because ARROW-8101 uses old
class name (NullType). The old class name was renamed to NullField by
ARROW-2255.
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