[#BloombergLP-ball-CategoryManager-setDefaultThresholdLevelsCallback]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/CategoryManager.adoc[CategoryManager]::setDefaultThresholdLevelsCallback
:relfileprefix: ../../../
:mrdocs:

Set or clear the default&hyphen;thresholds callback&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
setDefaultThresholdLevelsCallback(xref:BloombergLP/ball/CategoryManager/DefaultThresholdLevelsCallback.adoc[DefaultThresholdLevelsCallback] const* defaultThresholdLevelsCallback);
----

== Description

Set the default&hyphen;thresholds callback to the specified `defaultThresholdLevelsCallback` if it is not null, and remove any existing callback if `defaultThresholdLevelsCallback` is null&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *defaultThresholdLevelsCallback*
| callback to install, or null
|===


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