code: func (c *control) Exists(cgroupPath string) bool {
  	seelog.Debugf("Checking existence of cgroup: %s", cgroupPath)
  
  	controller, err := c.Load(cgroups.V1, cgroups.StaticPath(cgroupPath))
  	if err != nil || controller == nil {
  		return false
  	}
  
  	return true
  }
docs: // Exists is used to verify the existence of a cgroup