Github user hanm commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/590#discussion_r219659918
--- Diff: src/java/main/org/apache/zookeeper/server/watch/BitHashSet.java
---
@@ -0,0 +1,156 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
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+ * See the License for the specific language governing permissions and
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+ */
+
+package org.apache.zookeeper.server.watch;
--- End diff --
is there a reason that this `BitHashSet` is part of `server.watch` package
rather than part of `server.util` package, where a similar helper class
`BitMap` sits?
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