To be honest I think that functions returning a Bool value type should be rewritten to failable equivalents if the returned Bool means whether or not the function succeeded.

Essentially the use of Bool should always indicate existence of certain attribute. Like for checking if something is switched on or off or ex. if a value exists in some array. In case of returning a success status, we should always return failure which gives more information about the error (different errors may have different exit codes).

But that's out of scope of this PR. I'll create an issue