Try to unlink this path. If it doesn't exist, no error is returned. Returns
        a boolean indicating whether the path was really unlinked.

def try_unlink (self):
        """Try to unlink this path. If it doesn't exist, no error is returned. Returns
        a boolean indicating whether the path was really unlinked.

        """
        try:
            self.unlink ()
            return True
        except OSError as e:
            if e.errno == 2:
                return False # ENOENT
            raise