Returns a :class:`RTCRtpSynchronizationSource` for each unique SSRC identifier
        received in the last 10 seconds.

def getSynchronizationSources(self):
        """
        Returns a :class:`RTCRtpSynchronizationSource` for each unique SSRC identifier
        received in the last 10 seconds.
        """
        cutoff = clock.current_datetime() - datetime.timedelta(seconds=10)
        sources = []
        for source, timestamp in self.__active_ssrc.items():
            if timestamp >= cutoff:
                sources.append(RTCRtpSynchronizationSource(source=source, timestamp=timestamp))
        return sources