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

3 uses

	google.golang.org/grpc/internal/transport (current package)
		http_util.go#L397: var writeBufferMutex sync.Mutex
		http_util.go#L426: 	writeBufferMutex.Lock()
		http_util.go#L427: 	defer writeBufferMutex.Unlock()