code: func (ns *Namespace) TrimPrefix(prefix, s interface{}) (string, error) {
  	ss, err := cast.ToStringE(s)
  	if err != nil {
  		return "", err
  	}
  
  	sx, err := cast.ToStringE(prefix)
  	if err != nil {
  		return "", err
  	}
  
  	return _strings.TrimPrefix(ss, sx), nil
  }
docs: // TrimPrefix returns s without the provided leading prefix string. If s doesn't
  // start with prefix, s is returned unchanged.