[#BloombergLP-bdlm-MetricsRegistry-Callback]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlm.adoc[bdlm]::xref:BloombergLP/bdlm/MetricsRegistry.adoc[MetricsRegistry]::Callback
:relfileprefix: ../../../
:mrdocs:

This `typedef` is an alias for a metrics registration callback.

== Synopsis

Declared in `<bdlm_metricsregistry.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef xref:BloombergLP/bdlm/MetricsAdapter/Callback.adoc[MetricsAdapter::Callback] Callback;
----


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