func()

in version_helper.go [28:33]

• 6 lines of code
• 1 McCabe index (conditional complexity)

func (m *KeyedMutex) Lock(key string) func() {
	value, _ := m.mutexes.LoadOrStore(key, &sync.Mutex{})
	mtx := value.(*sync.Mutex)
	mtx.Lock()
	return func() { mtx.Unlock() }
}