o = append(o, 0xa5, 0x69, 0x6e, 0x64, 0x65, 0x78)
		o = msgp.AppendBytes(o, z.Index)
	}
	if (zb0001Mask & 0x40) == 0 { // if not omitted
		// string "crc"
		o = append(o, 0xa3, 0x63, 0x72, 0x63)
		o = msgp.AppendMapHeader(o, uint32(len(z.Checksums)))
		for za0001, za0002 := range z.Checksums {
			o = msgp.AppendString(o, za0001)
			o = msgp.AppendString(o, za0002)
		}
	}
	return
}