
  -spec list_to_pid(String) -> pid() when String :: string().

  Returns a process identifier whose text representation is a 
  String, for example:

    > list_to_pid("<0.4.1>").
    <0.4.1>

  Failure: badarg if String contains a bad representation of a
  process identifier.

  Warning:
    This BIF is intended for debugging and is not to be used in
    application programs.
