Lua command similar to '/chatlist'

[Sungam]

Does anyone know of a Lua command that will return a list of members in a chat channel, simiar to what /chatlist will?

Using '/chatlist "GuildName"' ingame will net me a string (to the chat window) of all current participants of the chat channel, but I can't seem to find any way of doing this through Lua.
The closest I've gotten is GetChannelList(), which only returns the channels the player is participating in - nothing about which other players are also in it.

An alternative would be a method to make a "Who" search by channels joined, but that doesn't seem to be an option, either.

Thanks in advance for any help.