[#BloombergLP-balm-MetricSample-const_iterator]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balm.adoc[balm]::xref:BloombergLP/balm/MetricSample.adoc[MetricSample]::const&lowbar;iterator
:relfileprefix: ../../../
:mrdocs:

A `const&lowbar;iterator` is an alias for an iterator over the non&hyphen;modifiable sample groups contained in a `MetricSample`&period;

== Synopsis

Declared in `&lt;balm&lowbar;metricsample&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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typedef xref:bsl/vector-00d.adoc[bsl::vector&lt;MetricSampleGroup&gt;::const&lowbar;iterator] const&lowbar;iterator;
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