var google.golang.org/grpc/internal/transport.ioBufferMutex

3 uses

	google.golang.org/grpc/internal/transport (current package)
		http_util.go#L414: var ioBufferMutex sync.Mutex
		http_util.go#L595: 	ioBufferMutex.Lock()
		http_util.go#L596: 	defer ioBufferMutex.Unlock()