[#BloombergLP-bdlc-HashTableDefaultTraits-isNull-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/HashTableDefaultTraits.adoc[HashTableDefaultTraits]::isNull
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:mrdocs:

Return true if the specified `bucket` has a null value, and false otherwise.

== Synopsis

Declared in `<bdlc_hashtable.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class BUCKET>
static
bool
isNull(BUCKET const& bucket);
----


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