code: func LoadRequirementsLock(c *chart.Chart) (*RequirementsLock, error) {
  	var data []byte
  	for _, f := range c.Files {
  		if f.TypeUrl == lockfileName {
  			data = f.Value
  		}
  	}
  	if len(data) == 0 {
  		return nil, ErrLockfileNotFound
  	}
  	r := &RequirementsLock{}
  	return r, yaml.Unmarshal(data, r)
  }
docs: // LoadRequirementsLock loads a requirements lock file.