GetComments.
        [Preview API] Gets the specified number of comments for a work item from the specified revision.
        :param int id: Work item id
        :param str project: Project ID or project name
        :param int from_revision: Revision from which comments are to be fetched (default is 1)
        :param int top: The number of comments to return (default is 200)
        :param str order: Ascending or descending by revision id (default is ascending)
        :rtype: :class:`<WorkItemComments> <azure.devops.v5_0.work_item_tracking.models.WorkItemComments>`

def get_comments(self, id, project=None, from_revision=None, top=None, order=None):
        """GetComments.
        [Preview API] Gets the specified number of comments for a work item from the specified revision.
        :param int id: Work item id
        :param str project: Project ID or project name
        :param int from_revision: Revision from which comments are to be fetched (default is 1)
        :param int top: The number of comments to return (default is 200)
        :param str order: Ascending or descending by revision id (default is ascending)
        :rtype: :class:`<WorkItemComments> <azure.devops.v5_0.work_item_tracking.models.WorkItemComments>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if id is not None:
            route_values['id'] = self._serialize.url('id', id, 'int')
        query_parameters = {}
        if from_revision is not None:
            query_parameters['fromRevision'] = self._serialize.query('from_revision', from_revision, 'int')
        if top is not None:
            query_parameters['$top'] = self._serialize.query('top', top, 'int')
        if order is not None:
            query_parameters['order'] = self._serialize.query('order', order, 'str')
        response = self._send(http_method='GET',
                              location_id='19335ae7-22f7-4308-93d8-261f9384b7cf',
                              version='5.0-preview.2',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('WorkItemComments', response)