parameter property
As a group's name can change, use of recipient is recommended. The
identifier associated with the notificationType value that defines the
receiver of the notification, where the receiver isn't implied by
notificationType value. So, when notificationType is:
UserTheparameteris the user account ID.GroupTheparameteris the group name.ProjectRoleTheparameteris the project role ID.UserCustomFieldTheparameteris the ID of the custom field.GroupCustomFieldTheparameteris the ID of the custom field.
Implementation
final String? parameter;