if err != nil {
		return
	}
	if z.CreatedBefore == nil {
		err = en.WriteNil()
		if err != nil {
			return
		}
	} else {
		err = en.WriteTime(*z.CreatedBefore)
		if err != nil {
			err = msgp.WrapError(err, "CreatedBefore")
			return
		}
	}
	// write "Tags"
	err = en.Append(0xa4, 0x54, 0x61, 0x67, 0x73)
	if err != nil {
		return
	}