UpdateWiki.
        [Preview API] Updates the wiki corresponding to the wiki Id or name provided using the update parameters.
        :param :class:`<WikiUpdateParameters> <azure.devops.v5_1.wiki.models.WikiUpdateParameters>` update_parameters: Update parameters.
        :param str wiki_identifier: Wiki name or Id.
        :param str project: Project ID or project name
        :rtype: :class:`<WikiV2> <azure.devops.v5_1.wiki.models.WikiV2>`

def update_wiki(self, update_parameters, wiki_identifier, project=None):
        """UpdateWiki.
        [Preview API] Updates the wiki corresponding to the wiki Id or name provided using the update parameters.
        :param :class:`<WikiUpdateParameters> <azure.devops.v5_1.wiki.models.WikiUpdateParameters>` update_parameters: Update parameters.
        :param str wiki_identifier: Wiki name or Id.
        :param str project: Project ID or project name
        :rtype: :class:`<WikiV2> <azure.devops.v5_1.wiki.models.WikiV2>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if wiki_identifier is not None:
            route_values['wikiIdentifier'] = self._serialize.url('wiki_identifier', wiki_identifier, 'str')
        content = self._serialize.body(update_parameters, 'WikiUpdateParameters')
        response = self._send(http_method='PATCH',
                              location_id='288d122c-dbd4-451d-aa5f-7dbbba070728',
                              version='5.1-preview.2',
                              route_values=route_values,
                              content=content)
        return self._deserialize('WikiV2', response)