private static ClusterNode findNodeById(Iterable<ClusterNode> top,UUID foundNodeId){
  for (  ClusterNode node : top)   if (foundNodeId.equals(node.id()))   return node;
  return null;
}

private static ClusterNode findNodeById ( Iterable < ClusterNode > top , UUID foundNodeId ) { for ( ClusterNode node : top ) if ( foundNodeId . equals ( node . id ( ) ) ) return node ; return null ; }
finds node by id . returns null in case of absence of specified id in request topology .
