Multiple elasticsearch hosts as output via upstream feature

[enp]

I need to set elasticsearch hosts as output and I've found #664 - so trying to do so:

config:
  outputs: |
    [UPSTREAM]
        Name elastic
    [NODE]
        Name es
        Match *
        Host 10.0.0.1
        Port 9200
        HTTP_User admin
        HTTP_Passwd admin
        tls On
        tls.verify Off
    [NODE]
        Name es
        Match *
        Host 10.0.0.2
        Port 9200
        HTTP_User admin
        HTTP_Passwd admin
        tls On
        tls.verify Off
    [OUTPUT]
        Name es
        Match *
        Upstream elastic

but receiving error:

[2022/08/19 14:08:51] [error] [config] es: unknown configuration property 'Upstream'. The following properties are allowed: index, type, suppress_type_name, http_user, http_passwd, cloud_id, cloud_auth, aws_auth, aws_region, aws_sts_endpoint, aws_role_arn, aws_external_id, logstash_format, logstash_prefix, logstash_prefix_key, logstash_dateformat, time_key, time_key_format, time_key_nanos, include_tag_key, tag_key, buffer_size, path, pipeline, generate_id, write_operation, id_key, replace_dots, current_time_index, trace_output, and trace_error.

Please show me working example of using upstream feature