code: func (r *Reference) MustGet() interface{} {
  	value, err := r.Get()
  	if err != nil {
  		panic(fmt.Sprintf("error returned from Get: %s", err))
  	}
  	return value
  }
docs: // MustGet returns the value. If an error is returned
  // during initialization of the value then this function
  // will panic.