title: ML.NET how to detect a model is missing from the PredictionEnginePool
body: <p>I'm trying to check if a model exists in the PredictionEnginePool by calling predictionEnginePool.GetModel(modelName: "ModelA") but I get an exception saying the model is not in the Dictionary even though I pass in the correct model name specified during creation. </p>
  
  <p>Is this the right way to look for a model or is there a better way?</p>