Interface TaskParticipantEvent

interface TaskParticipantEvent {
    participantAdded: (task: Task, participant: TaskParticipant) => void;
    participantAddFailed: (task: Task, participant: TaskParticipant) => void;
    participantModified: (task: Task, participant: TaskParticipant) => void;
    participantModifyFailed: (task: Task, participant: TaskParticipant) => void;
    participantRemoved: (task: Task, participant: TaskParticipant) => void;
    participantRemoveFailed: (task: Task, participant: TaskParticipant) => void;
}