[#BloombergLP-ball-UserFieldValue-isUnset]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/UserFieldValue.adoc[UserFieldValue]::isUnset
:relfileprefix: ../../../
:mrdocs:

Return `true` if this object has the unset value, and `false` otherwise. Note that if `isUnset()` returns `true`, then `type()` returns `ball::UserFieldType::e_VOID`.

== Synopsis

Declared in `<ball_userfieldvalue.h>`

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


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