def METHOD_NAME(self, card, comment=''):
    """
    Adds a CSHEAR card from ``BDF.add_card(...)``
    Parameters
    ----------
    card : BDFCard()
        a BDFCard object
    comment : str; default=''
        a comment for the card
    """
    eid = integer(card, 1, 'eid')
    pid = integer_or_blank(card, 2, 'pid', eid)
    nids = [integer_or_blank(card, 3, 'n1'),
            integer_or_blank(card, 4, 'n2'),
            integer_or_blank(card, 5, 'n3'),
            integer_or_blank(card, 6, 'n4')]
    assert len(card) <= 7, 'len(CSHEAR card) = %i\ncard=%s' % (len(card), card)
    self.add(eid, pid, nids)