public static void checkConvergenceFromAnyHost(ServiceHost host,NodeGroupState ngs,Operation parentOp){
  checkConvergenceAcrossPeers(host,ngs,parentOp);
}

public static void checkConvergenceFromAnyHost ( ServiceHost host , NodeGroupState ngs , Operation parentOp ) { checkConvergenceAcrossPeers ( host , ngs , parentOp ) ; }
issues a convergence request to the node group service on all peers and returns success if all nodes confirm that they are converged ( in terms of last membership update ) . this method should be used when the supplied host is not part of the node group
