+-- | Enumerate the members of an 'IPv4SequenceMember'. A sequence
+-- member is either an octet, which is easy to enumerate -- we just
+-- print it -- or an octet range whose members can be enumerated
+-- from least to greatest.
+--
+-- We enumerate strings instead of integers because the big picture
+-- is that we will be listing out patterns of ipv4 addresses, and
+-- those are represented as strings (dotted quad format).
+--
+-- ==== _Examples_
+--
+-- >>> let (Right r) = parse v4seq_member "" "127"
+-- >>> sequence_members r
+-- ["127"]
+--
+-- >>> let (Right r) = parse v4seq_member "" "127..135"
+-- >>> sequence_members r
+-- ["127","128","129","130","131","132","133","134","135"]
+--