[#BloombergLP-balm-MetricSample-const_iterator]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balm.adoc[balm]::xref:BloombergLP/balm/MetricSample.adoc[MetricSample]::const_iterator
:relfileprefix: ../../../
:mrdocs:

A `const_iterator` is an alias for an iterator over the non‐modifiable sample groups contained in a `MetricSample`.

== Synopsis

Declared in `<balm_metricsample.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef xref:bsl/vector-027/const_iterator.adoc[bsl::vector<MetricSampleGroup>::const_iterator] const_iterator;
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