static L<GazelleLine> dm_discord_linesInChannelBy(long channelID, long userID) {
  ret map dm_discord_importLine((L) dm_call(dm_gazelle_linesCRUD(), 'linesInChannelBy, channelID, userID));
}

static L<GazelleLine> dm_discord_linesInChannelBy(S channelName, S userName) {
  ret dm_discord_linesInChannelBy(
    (long) dm_call(dm_gazelle_linesCRUD(), 'idForChannel, channelName), 
    (long) dm_call(dm_gazelle_linesCRUD(), 'idForUser, userName));
}

Began life as a copy of #1021676