@Override
  public void clear() {         // Smack a new empty table down
    Object[] newkvs = new NonBlockingIdentityHashMap(MIN_SIZE)._kvs;
    while( !CAS_kvs(_kvs,newkvs) ) // Spin until the clear works
      ;
  }
Removes all of the mappings from this map.
jctools-core/src/main/java/org/jctools/maps/NonBlockingIdentityHashMap.java