@Override public UUID createEntryNode(UUID parentNode){
  UUID uuid=UUID.randomUUID();
  graphServer.addVertex(uuid);
  graphServer.addEdge(uuid,parentNode);
  return uuid;
}

@ Override public UUID createEntryNode ( UUID parentNode ) { UUID uuid = UUID . randomUUID ( ) ; graphServer . addVertex ( uuid ) ; graphServer . addEdge ( uuid , parentNode ) ; return uuid ; }
creates a node that accepts input into the routing network can only connect to one other node
