Override default, adding the capture of members.

def from_dict(cls, d):
        """ Override default, adding the capture of members.
        """
        o = super(DistributionList, cls).from_dict(d)
        o.members = []
        if 'dlm' in d:
            o.members = [utils.get_content(member)
                         for member in utils.as_list(d["dlm"])]
        return o