presto-main/src/main/java/io/prestosql/memory/LocalMemoryManagerExporter.java/LocalMemoryManagerExporter/destroy
class LocalMemoryManagerExporter:    @PreDestroy
    public synchronized void destroy()
    {
        for (MemoryPool pool : pools) {
            String objectName = ObjectNames.builder(MemoryPool.class, pool.getId().toString()).build();
            try {
                exporter.unexport(objectName);
            }
            catch (JmxException e) {
                // ignored
            }
        }
        pools.clear();
    }