Programmatically determine Coherence master member

I need to run a piece of my java code by only one Coherence cluster member. So, I chose the master member for this. Is there an API to check out whether the current member is the master coordinator member? I am using Oracle Coherence 12.1.3-0-0

NamedCache cache = CacheFactory.getCache("cacheName");
Cluster c = cache.getCacheService().getCluster();
if (c.getLocalMember().equals(c.getOldestMember())) {
  //do the stuff
}