'Setter. Allows for self.receivers = value.
This appends a new receiver to the message.'

def __receivers_set(self, receivers):

    for receiver in make_iter(receivers):
        if (not receiver):
            continue
        if (not hasattr(receiver, '__dbclass__')):
            raise ValueError('This    is    a    not    a    typeclassed    object!')
        clsname = receiver.__dbclass__.__name__
        if (clsname == 'ObjectDB'):
            self.db_receivers_objects.add(receiver)
        elif (clsname == 'PlayerDB'):
            self.db_receivers_players.add(receiver)
