GetRevision.
        [Preview API] Returns a fully hydrated work item for the requested revision
        :param int id:
        :param int revision_number:
        :param str project: Project ID or project name
        :param str expand:
        :rtype: :class:`<WorkItem> <azure.devops.v5_1.work-item-tracking.models.WorkItem>`

def get_revision(self, id, revision_number, project=None, expand=None):
        """GetRevision.
        [Preview API] Returns a fully hydrated work item for the requested revision
        :param int id:
        :param int revision_number:
        :param str project: Project ID or project name
        :param str expand:
        :rtype: :class:`<WorkItem> <azure.devops.v5_1.work-item-tracking.models.WorkItem>`
        """
        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')
        if revision_number is not None:
            route_values['revisionNumber'] = self._serialize.url('revision_number', revision_number, 'int')
        query_parameters = {}
        if expand is not None:
            query_parameters['$expand'] = self._serialize.query('expand', expand, 'str')
        response = self._send(http_method='GET',
                              location_id='a00c85a5-80fa-4565-99c3-bcd2181434bb',
                              version='5.1-preview.3',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('WorkItem', response)