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

Return a reference to the non‐modifiable `MetricSampleGroup` object at the specified `index` in this sample. The behavior is undefined unless `0 <= index < numGroups()`. Note that the returned reference will remain valid until this sample is modified by invoking `appendGroup` or `removeAllRecords()`.

== Synopsis

Declared in `<balm_metricsample.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/balm/MetricSampleGroup.adoc[MetricSampleGroup] const&
sampleGroup(int index) const;
----


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