public CheckpointSuggestedWorkItem(
     CoreProjection projection, EventReaderSubscriptionMessage.CheckpointSuggested message,
     ICoreProjectionCheckpointManager checkpointManager)
     : base(projection) 
 {
     _projection = projection;
     _message = message;
     _checkpointManager = checkpointManager;
 }
 public CheckpointSuggestedWorkItem(
     IProjectionPhaseCheckpointManager projectionPhase, EventReaderSubscriptionMessage.CheckpointSuggested message,
     ICoreProjectionCheckpointManager checkpointManager)
     : base() 
 {
     _projectionPhase = projectionPhase;
     _message = message;
     _checkpointManager = checkpointManager;
 }