def get_comments(self, project, work_item_id, top=None, continuation_token=None, include_deleted=None, expand=None, order=None):
        """GetComments.
        [Preview API] Returns a list of work item comments, pageable.
        :param str project: Project ID or project name
        :param int work_item_id: Id of a work item to get comments for.
        :param int top: Max number of comments to return.
        :param str continuation_token: Used to query for the next page of comments.
        :param bool include_deleted: Specify if the deleted comments should be retrieved.
        :param str expand: Specifies the additional data retrieval options for work item comments.
        :param str order: Order in which the comments should be returned.
        :rtype: :class:`<CommentList> <azure.devops.v5_1.work-item-tracking.models.CommentList>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if work_item_id is not None:
            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
        query_parameters = {}
        if top is not None:
            query_parameters['$top'] = self._serialize.query('top', top, 'int')
        if continuation_token is not None:
            query_parameters['continuationToken'] = self._serialize.query('continuation_token', continuation_token, 'str')
        if include_deleted is not None:
            query_parameters['includeDeleted'] = self._serialize.query('include_deleted', include_deleted, 'bool')
        if expand is not None:
            query_parameters['$expand'] = self._serialize.query('expand', expand, 'str')
        if order is not None:
            query_parameters['order'] = self._serialize.query('order', order, 'str')
        response = self._send(http_method='GET',
                              location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
                              version='5.1-preview.3',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('CommentList', response)