// write "Key"
	err = en.Append(0x82, 0xa3, 0x4b, 0x65, 0x79)
	if err != nil {
		return
	}
	err = en.WriteString(z.Key)
	if err != nil {
		err = msgp.WrapError(err, "Key")
		return
	}
	// write "Value"
	err = en.Append(0xa5, 0x56, 0x61, 0x6c, 0x75, 0x65)
	if err != nil {
		return
	}
	err = en.WriteString(z.Value)
	if err != nil {
		err = msgp.WrapError(err, "Value")
		return
	}
	return
}