Evaluate multi-input neural network model
Returns the loss value and the metric values for a multi-input model in test mode. Computation is done in batches.

Inputs
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Model — DynamicObject
The trained model to evaluate.
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Testing X — DynamicObject
A DynamicObject mapping the input names of the neural network to the correspoding test input data.
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Testing Y — Tensor
Test output data.
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Batch size — Integer
Number of samples per batch of computation.
 
Outputs
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Loss — Float
Test loss of the model.
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Metric values — DynamicObject
A DynamicObject mapping metric names to their corresponding value (Float).