[#BloombergLP-balb-FeatureTestMessage-isUndefinedValue]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balb.adoc[balb]::xref:BloombergLP/balb/FeatureTestMessage.adoc[FeatureTestMessage]::isUndefinedValue
:relfileprefix: ../../../
:mrdocs:

Return `true` if the value of this object is undefined, and `false` otherwise.

== Synopsis

Declared in `<balb_testmessages.h>`

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


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