'Destroy relationships between thing1 and some thing2s.'

@classmethod
@will_write
def destroy(cls, thing1, thing2s):

    thing2s = tup(thing2s)
    cls._cf.remove(thing1._id36, (thing2._id36 for thing2 in thing2s))
    for view in cls._views:
        view.destroy(thing1, thing2s)
