debc5e21_Activiti_User_Guide_Table_1__Supported_events_Event_name
[Description] All members will be removed from a group. The event is thrown before the members are removed, so they are still accessible. No individual MEMBERSHIP_DELETED events will be thrown if all members are deleted at once, for performance reasons. [Event classes] org.activiti…​ActivitiMembershipEvent [Event name] 
MEMBERSHIPS_DELETED
Activiti User Guide
Event name