Access.fetch-exclamation-mark

You're seeing just the function fetch-exclamation-mark, go back to Access module for more information.

fetch!(container, key)

(since 1.10.0)

fetch!(container(), term()) :: term()

Same as fetch/2 but returns the value directly, or raises a KeyError exception if key is not found.

iex> Access.fetch!(%{name: "meg", age: 26}, :name)
"meg"