Discord.SortedSet.at

You're seeing just the function at, go back to Discord.SortedSet module for more information.

at(set, index, default \\ nil)

Specs

at(set :: t(), index :: non_neg_integer(), default :: any()) ::
  (item_or_default :: Discord.SortedSet.Types.supported_term() | any())
  | Discord.SortedSet.Types.common_errors()

Retrieve an item at the given index.

If the index is out of bounds then the optional default value is returned instead, this defaults to nil if not provided.