[#BloombergLP-ball-LoggerManager-userFieldsPopulatorCallback-0c]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/LoggerManager.adoc[LoggerManager]::userFieldsPopulatorCallback
:relfileprefix: ../../../
:mrdocs:

Return the address of the non‐modifiable user populator functor registered with this logger manager, or 0 if there is no registered user populator functor.

== Synopsis

Declared in `<ball_loggermanager.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/ball/LoggerManager/UserFieldsPopulatorCallback-05.adoc[UserFieldsPopulatorCallback] const*
userFieldsPopulatorCallback() const;
----


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