[#BloombergLP-ball-AttributeCollectorRegistry-Visitor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/AttributeCollectorRegistry.adoc[AttributeCollectorRegistry]::Visitor
:relfileprefix: ../../../
:mrdocs:

`Visitor` is the type of a user‐supplied visit functor.

== Synopsis

Declared in `<ball_attributecollectorregistry.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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typedef xref:bsl/function-0a.adoc[bsl::function<void(xref:BloombergLP/ball/Attribute.adoc[ball::Attribute] const&)>] Visitor;
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