Discord.SortedSet.NifBridge.size
You're seeing just the function
size, go back to Discord.SortedSet.NifBridge module for more information.
Specs
size(set :: Discord.SortedSet.t()) :: non_neg_integer()
Gets the size of the SortedSet.
This function follows the standard Elixir naming convention, size takes O(1) time as the size is tracked with every addition and removal.