code: public boolean suspendCassandraHost(CassandraHost cassandraHost) {
      HClientPool pool = hostPools.remove(cassandraHost);
      boolean removed = pool != null;
      if ( removed ) {
        suspendedHostPools.put(cassandraHost, pool);
      }
      listenerHandler.fireOnSuspendHost(cassandraHost, removed);
      log.info("Suspend operation status was {} for CassandraHost {}", removed, cassandraHost);
      return removed;
    }
docs: Remove the {@link HClientPool} referenced by the {@link CassandraHost} from
  the active host pools. This does not shut down the pool, only removes it as a candidate from
  future operations.
  @param cassandraHost
  @return true if the operation was successful.