for (GroupInfo record : groupStore.getGroups()) {
out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
new ArrayList<>(record.members), createGroupAvatarAttachment(record.groupId),
for (GroupInfo record : groupStore.getGroups()) {
out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
new ArrayList<>(record.members), createGroupAvatarAttachment(record.groupId),