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

Return `true` if underlying map owns the keys and `false` otherwise. Note that `false` is always returned for zero‐sized `DatumMapRef`.

== Synopsis

Declared in `<bdld_datum.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
ownsKeys() const;
----


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