presto-main/src/main/java/io/prestosql/server/WorkerResource.java/WorkerResource/WorkerResource
class WorkerResource:    @Inject
    public WorkerResource(InternalNodeManager nodeManager, @ForWorkerInfo HttpClient httpClient)
    {
        this.nodeManager = requireNonNull(nodeManager, "nodeManager is null");
        this.httpClient = requireNonNull(httpClient, "httpClient is null");
    }