@Override
        public int hashCode() {
            // No need to precompute this as it is not called by the map
            return Objects.hash(capacity, insertionTime);
        }
Perform work with a {@link ByteBuffer} obtained from the pool. The {@link ByteBuffer}
must not be used outside of the work lambda.
stroom-bytebuffer/src/main/java/stroom/bytebuffer/ByteBufferPoolImpl.java