public boolean removeProxyFromMap(ObjectName objectName, RegionMXBean proxy,
      FederationComponent oldState) {
    mapOfProxy.remove(objectName);
    setSize = mapOfProxy.keySet().size();
    if (setSize == 0) {
      return true;
    }
    updateRegion(null, oldState);
    return false;
  }
Removes proxy from the proxy set

@param objectName name of the MBean
@param proxy reference to the actual proxy
@return true if this DistributedRegion's proxy set is empty
geode-core/src/main/java/org/apache/geode/management/internal/beans/DistributedRegionBridge.java