File.cp_r-exclamation-mark

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

cp_r!(source, destination, callback \\ fn _, _ -> true end)

cp_r!(Path.t(), Path.t(), (Path.t(), Path.t() -> boolean())) :: [binary()]

The same as cp_r/3, but raises a File.CopyError exception if it fails. Returns the list of copied files otherwise.