[#BloombergLP-ball-MultiplexObserver-deregisterObserver]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/MultiplexObserver.adoc[MultiplexObserver]::deregisterObserver
:relfileprefix: ../../../
:mrdocs:

Remove the specified `observer` from the registry of this multiplexing observer. Return 0 if `observer` is non‐null and was registered with this multiplexing observer, and a non‐zero value (with no effect) otherwise. Henceforth, `observer` will no longer receive log records from this multiplexing observer.

== Synopsis

Declared in `<ball_multiplexobserver.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
deregisterObserver(xref:BloombergLP/ball/Observer.adoc[Observer]* observer);
----


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