{% macro MercureStream(topic, private=True, hx_swap="beforeend") -%}
<div hx-ext="sse" sse-connect="{{mercure_authentified_hub_url(topic) if private else mercure_hub_url(topic)}}" hx-swap="{{hx_swap}}" {{html_attrs(**kwargs)}}>
    {{ caller() }}
</div>
{%- endmacro %}