code: func NewHelperMap() (HelperMap, error) {
  	hm := HelperMap{
  		helpers: map[string]interface{}{},
  		moot:    &sync.Mutex{},
  	}
  
  	err := hm.AddMany(Helpers.Helpers())
  	if err != nil {
  		return hm, err
  	}
  	return hm, nil
  }
docs: // NewHelperMap containing all of the "default" helpers from "plush.Helpers".