@Deprecated
    @Override
    public CompletableFuture<Endpoint> select(ClientRequestContext ctx,
                                              ScheduledExecutorService executor,
                                              long timeoutMillis) {
        return select(ctx, executor);
    }
Constructs a new {@link CompositeEndpointGroup} that merges all the given {@code endpointGroups}.
core/src/main/java/com/linecorp/armeria/client/endpoint/CompositeEndpointGroup.java