@Override
    public String toString() {
        return toString(buf -> {
            buf.append(", serviceName=").append(serviceName);
            if (datacenter != null) {
                buf.append(", datacenter=").append(datacenter);
            }
            if (filter != null) {
                buf.append(", filter=").append(filter);
            }
        });
    }
Returns a newly-created {@link ConsulEndpointGroupBuilder} with the specified {@code consulUri}
and {@code serviceName} to build {@link ConsulEndpointGroupBuilder}.

@param consulUri the URI of Consul API service
@param serviceName the service name to register
consul/src/main/java/com/linecorp/armeria/client/consul/ConsulEndpointGroup.java