Returns a new ``Link`` based on a JSON object or array.

        Arguments:

        - ``o``: a dictionary holding the deserializated JSON for the new
                 ``Link``, or a ``list`` of such documents.
        - ``base_uri``: optional URL used as the basis when expanding
                               relative URLs in the link.

def from_object(cls, o, base_uri):
        """Returns a new ``Link`` based on a JSON object or array.

        Arguments:

        - ``o``: a dictionary holding the deserializated JSON for the new
                 ``Link``, or a ``list`` of such documents.
        - ``base_uri``: optional URL used as the basis when expanding
                               relative URLs in the link.

        """
        if isinstance(o, list):
            if len(o) == 1:
                return cls.from_object(o[0], base_uri)

            return [cls.from_object(x, base_uri) for x in o]

        return cls(o, base_uri)