restart one BGP session cmd

Hello! I have difficulty to find which is the command to restart only one BGP session in Bird 2.0.7 ? I am aware of the graceful restarts and so on but for all the sessions. How about for only 1 BGP session while troubleshooting ? Thanks in advance! Eirini -- Irene Lalioti Network Engineer Fondation RESTENA 2, avenue de l'Université L-4365 Esch/Alzette Tel: +352 424409 1 Fax: +352 422473