Convert the cells to a dictionary.

        This is intended to be used with HappyBase, so the column family and
        column qualiers are combined (with ``:``).

        :rtype: dict
        :returns: Dictionary containing all the data in the cells of this row.

def to_dict(self):
        """Convert the cells to a dictionary.

        This is intended to be used with HappyBase, so the column family and
        column qualiers are combined (with ``:``).

        :rtype: dict
        :returns: Dictionary containing all the data in the cells of this row.
        """
        result = {}
        for column_family_id, columns in six.iteritems(self._cells):
            for column_qual, cells in six.iteritems(columns):
                key = _to_bytes(column_family_id) + b":" + _to_bytes(column_qual)
                result[key] = cells
        return result