[#CRollingBloomFilter-contains]
= xref:CRollingBloomFilter.adoc[CRollingBloomFilter]::contains
:relfileprefix: ../
:mrdocs:

Test whether a raw key was recently inserted&period;

== Synopsis

Declared in `&lt;common&sol;bloom&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
contains(std::span&lt;unsigned char const&gt; vKey) const;
----

== Return Value

true if the key may have been recently inserted (subject to false positives)&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *vKey*
| The bytes to test&period;
|===


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