#vulnerable code 
                             @Override
	public Mono<RSocket> accept(ConnectionSetupPayload setup, RSocket sendingSocket) {

		if (setup.hasMetadata()) { // and setup.metadataMimeType() is Announcement metadata
			String annoucementMetadata = Metadata.decodeAnnouncement(setup.sliceMetadata());
			List<String> tags = Collections.singletonList(annoucementMetadata);
			registry.register(tags, sendingSocket);

			List<MonoProcessor<RSocket>> processors = this.registry.getPendingRequests(tags);
			if (!CollectionUtils.isEmpty(processors)) {
				processors.forEach(processor -> {
					processor.log("resume-pending-request");
					processor.onNext(sendingSocket);
					processor.onComplete();
				});
			}
		}

		return Mono.just(proxyRSocket);
	} 
                            #location 11 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Override
	public Mono<RSocket> accept(ConnectionSetupPayload setup, RSocket sendingSocket) {

		if (setup.hasMetadata()) { // and setup.metadataMimeType() is Announcement metadata
			String annoucementMetadata = Metadata.decodeAnnouncement(setup.sliceMetadata());
			List<String> tags = Collections.singletonList(annoucementMetadata);
			registry.register(tags, sendingSocket);
		}

		return Mono.just(proxyRSocket);
	}