public DataChangedEventListener getChangedEventListener(final String discoveryId) {
        return this.dataChangedEventListenerMap.get(discoveryId);
    }
getChangedEventListener.

@param discoveryId discoveryId
@return {@link DataChangedEventListener}
shenyu-admin/src/main/java/org/apache/shenyu/admin/discovery/AbstractDiscoveryProcessor.java