[#BloombergLP-ball-MultiplexObserver-numRegisteredObservers] = xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/MultiplexObserver.adoc[MultiplexObserver]::numRegisteredObservers :relfileprefix: ../../../ :mrdocs: Return the number of observers registered with this multiplexing observer. == Synopsis Declared in `<ball_multiplexobserver.h>` [source,cpp,subs="verbatim,replacements,macros,-callouts"] ---- int numRegisteredObservers() const; ---- [.small]#Created with https://www.mrdocs.com[MrDocs]#