[#BloombergLP-balm-operator_lshift-0e4]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balm.adoc[balm]::operator<<
:relfileprefix: ../../
:mrdocs:

Write a description of the specified `rhs` metric id to the specified `stream` in some human‐readable format, and return a reference to the modifiable `stream`.

== Synopsis

Declared in `<balm_metricid.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::ostream&
operator<<(
    std::ostream& stream,
    xref:BloombergLP/balm/MetricId.adoc[MetricId] const& rhs);
----


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