@Override
        public int hashCode() {
            return hashCode;
        }
An extension of SimpleMemoryPool that tracks allocated buffers and logs an error when they "leak"
(when they are garbage-collected without having been release()ed).
THIS IMPLEMENTATION IS A DEVELOPMENT/DEBUGGING AID AND IS NOT MEANT PRO PRODUCTION USE.
clients/src/main/java/org/apache/kafka/common/memory/GarbageCollectedMemoryPool.java