-- binary
06 12 # version, type
00 10 # length
12 34 56 78 # xid
00 08 # multipart message type (OFPMP_GROUP_FEATURES)
00 01 # flags
00 00 00 00 # pad
-- java
builder
        .setXid(0x12345678)
        .setFlags(ImmutableSet.<OFStatsRequestFlags>of(OFStatsRequestFlags.REQ_MORE))
        .build()