Appy created HBASE-18926:
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Summary: Cleanup Optional<T> from method params
Key: HBASE-18926
URL: https://issues.apache.org/jira/browse/HBASE-18926
Project: HBase
Issue Type: Improvement
Reporter: Appy
Assignee: Duo Zhang
ref: Discussion on HBASE-18878
tldr: Optional is not supposed to be used in method params or class fields
(http://dolszewski.com/java/java-8-optional-use-cases/). We are doing that in
some places. Let's revert that.
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