Nostrum.Cache.GuildCache.select-exclamation-mark

You're seeing just the function select-exclamation-mark, go back to Nostrum.Cache.GuildCache module for more information.

select!(id, selector)

select!(Nostrum.Struct.Guild.id(), selector()) :: any() | no_return()

Same as select/2, but raises Nostrum.Error.CacheError in case of failure.