[#BloombergLP-ball-CategoryManager_RadixTree-contains]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/CategoryManager_RadixTree.adoc[CategoryManager&lowbar;RadixTree]::contains
:relfileprefix: ../../../
:mrdocs:

Return `true` if this tree contains an entry for the specified `key`, and `false` otherwise&period;

== Synopsis

Declared in `&lt;ball&lowbar;categorymanager&lowbar;radixtree&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
contains(std::string&lowbar;view const& key) const;
----


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