code: func (ns *Namespace) Split(a interface{}, delimiter string) ([]string, error) {
  	aStr, err := cast.ToStringE(a)
  	if err != nil {
  		return []string{}, err
  	}
  
  	return _strings.Split(aStr, delimiter), nil
  }
docs: // Split slices an input string into all substrings separated by delimiter.