private void gatherFields(Multimap<ProtoType, ProtoMember> sink, ProtoType type, Object o) {
if (o instanceof Map) {
for (Map.Entry<?, ?> entry : ((Map<?, ?>) o).entrySet()) {
ProtoMember protoMember = (ProtoMember) entry.getKey();
sink.put(type, protoMember);
gatherFields(sink, protoMember.type(), entry.getValue());
}
} else if (o instanceof List) {
for (Object e : (List) o) {
gatherFields(sink, type, e);
}
}
}
Multimap<ProtoType, ProtoMember> fields() {
Multimap<ProtoType, ProtoMember> result = LinkedHashMultimap.create();
gatherFields(result, optionType, map);
return result;
}