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

Type for immutable access to the optional value&period; Used also as return type for immutable finders where empty optional signifies &quot;not found&quot;&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef xref:bsl/optional-072.adoc[bsl::optional&lt;bsl::reference&lowbar;wrapper&lt;t&lowbar;VALUE const&gt;&gt;] OptValueCRef;
----


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