protected Member findClusterMember(String region) {
		Set<Member> clusterMember = hazelcastInstance.getCluster().getMembers();
		for (Member member: clusterMember) {
			if (isSupportedRegion(member, region)) {
				return member;
			}
		}
		throw new IllegalArgumentException(region + " is not clustered region.");
	}
For support data clustering using hazelcast instance.

@since 3.5.0
ngrinder-controller/src/main/java/org/ngrinder/infra/hazelcast/HazelcastService.java