code: func (p *Parameters) String() (ret string) {
  	ret = "["
  	for i, v := range p.data() {
  		if i > 0 {
  			ret += " "
  		}
  		ret += string(v.key) + ":" + string(v.value)
  	}
  	return ret + "]"
  }
docs: // String represents parameters as a string.