'Return dictionary prepared with module content and type for indexing.'

def index_dictionary(self):

    xblock_body = super(SequenceDescriptor, self).index_dictionary()
    html_body = {'display_name': self.display_name}
    if ('content' in xblock_body):
        xblock_body['content'].update(html_body)
    else:
        xblock_body['content'] = html_body
    xblock_body['content_type'] = 'Sequence'
    return xblock_body
