def __init__(self, l, containerType):
        NotKnown.__init__(self)
        self.containerType = containerType
        self.l = l
        self.locs = range(len(l))
        for idx in xrange(len(l)):
            if not isinstance(l[idx], NotKnown):
                self.locs.remove(idx)
            else:
                l[idx].addDependant(self, idx)
        if not self.locs:
            self.resolveDependants(self.containerType(self.l))
@param l: The list of object which may contain some not yet referenced
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/persisted/crefutil.py/_Container.__init__