def METHOD_NAME(self, xtrain, ytrain, xtest, test_pred, slice_size: int = 4):
    """
    This method is only used for debugging purposes.
    Query the architectures in the set so that we can evaluate
    the performance of the predictor.
    """
    ytest = []
    for arch in xtest:
        ytest.append(
            arch.query(
                self.performance_metric, self.dataset, dataset_api=self.dataset_api
            )
        )
    print("ytrain shape", np.array(ytrain).shape)
    print("ytest shape", np.array(ytest).shape)
    print("test_pred shape", np.array(test_pred).shape)
    test_error = np.mean(abs(test_pred - ytest))
    correlation = np.corrcoef(np.array(ytest), np.array(test_pred))[1, 0]
    print("test error", test_error)
    print("correlation", correlation)
    print()
    print("xtrain slice", xtrain[:slice_size])
    print("ytrain slice", ytrain[:slice_size])
    print()
    print("xtest slice", xtest[:slice_size])
    print("ytest slice", ytest[:slice_size])
    print("test_pred slice", test_pred[:slice_size])