code: public HazelcastInstance getHazelcastInstance() {
  		if (StringUtils.hasText(this.config.getInstanceName())) {
  			return Hazelcast.getOrCreateHazelcastInstance(this.config);
  		}
  		return Hazelcast.newHazelcastInstance(this.config);
  	}
docs: Get the {@link HazelcastInstance}.
  @return the {@link HazelcastInstance}