
  -spec spawn_link(Node, Fun) -> pid()
                      when Node :: node(), Fun :: function().

  Returns the process identifier (pid) of a new process started by
  the application of Fun to the empty list [] on Node. A link
  is created between the calling process and the new process,
  atomically. If Node does not exist, a useless pid is returned
  and an exit signal with reason noconnection is sent to the
  calling process. Otherwise works like spawn/3.
