Remove the observer having the specified observerName from the registry of this broadcast observer. Return 0 if the observer having observerName was successfully deregistered, and a non-zero value (with no effect) otherwise. Henceforth, the observer that had observerName will no longer receive log records from this observer.
Declared in <ball_broadcastobserver.h>
int
deregisterObserver(std::string_view const& observerName);