[#BloombergLP-bdld-DatumMapRef-back]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdld.adoc[bdld]::xref:BloombergLP/bdld/DatumMapRef.adoc[DatumMapRef]::back
:relfileprefix: ../../../
:mrdocs:

Return a reference providing non‐modifiable access to the last element of the map this reference object represents. The behavior is undefined unless `size() > 0`.

== Synopsis

Declared in `<bdld_datum.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdld/DatumMapRef/const_reference.adoc[DatumMapRef::const_reference]
back() const;
----


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