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