AddDefinitionTags.
        [Preview API] Adds multiple tags to a definition.
        :param [str] tags: The tags to add.
        :param str project: Project ID or project name
        :param int definition_id: The ID of the definition.
        :rtype: [str]

def add_definition_tags(self, tags, project, definition_id):
        """AddDefinitionTags.
        [Preview API] Adds multiple tags to a definition.
        :param [str] tags: The tags to add.
        :param str project: Project ID or project name
        :param int definition_id: The ID of the definition.
        :rtype: [str]
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if definition_id is not None:
            route_values['definitionId'] = self._serialize.url('definition_id', definition_id, 'int')
        content = self._serialize.body(tags, '[str]')
        response = self._send(http_method='POST',
                              location_id='cb894432-134a-4d31-a839-83beceaace4b',
                              version='5.0-preview.2',
                              route_values=route_values,
                              content=content)
        return self._deserialize('[str]', self._unwrap_collection(response))