<T> T findProxy(ObjectName objectName, Class<T> interfaceClass) {
    return proxyFactory.findProxy(objectName, interfaceClass);
  }
Find a particular proxy instance for a {@link ObjectName}, {@link DistributedMember} and
interface class If the proxy interface does not implement the given interface class a
{@link ClassCastException} will be thrown

@param objectName {@link ObjectName} of the MBean
@param interfaceClass interface class implemented by proxy

@return an instance of proxy exposing the given interface
geode-core/src/main/java/org/apache/geode/management/internal/FederatingManager.java