CollabTopicAccept
    collab CollabId
    accept OutboxItemId

    UniqueCollabTopicAcceptCollab collab
    UniqueCollabTopicAcceptAccept accept

CollabRecipLocalAccept
    collab CollabRecipLocalId
    accept OutboxItemId

    UniqueCollabRecipLocalAcceptCollab collab
    UniqueCollabRecipLocalAcceptAccept accept

CollabRecipRemoteAccept
    collab CollabRecipRemoteId
    accept RemoteActivityId

    UniqueCollabRecipRemoteAcceptCollab collab
    UniqueCollabRecipRemoteAcceptAccept accept