This filter is used when looking for supergroup members to mention.
This filter will automatically remove anonymous admins, and return even non-participant users that replied to a specific thread through the comment section of a channel.
channelParticipantsMentions#e04b5ceb flags:# q:flags.0?string top_msg_id:flags.1?int = ChannelParticipantsFilter;
|Flags, see TL conditional fields
|Filter by user name or username
|Look only for users that posted in this thread
Telegram allows commenting on a channel post or on a generic supergroup message, thanks to message threads.