code: func (ns *Namespace) HasSuffix(s, suffix interface{}) (bool, error) {
  	ss, err := cast.ToStringE(s)
  	if err != nil {
  		return false, err
  	}
  
  	sx, err := cast.ToStringE(suffix)
  	if err != nil {
  		return false, err
  	}
  
  	return _strings.HasSuffix(ss, sx), nil
  }
docs: // HasSuffix tests whether the input s begins with suffix.