private IntermediateOperation addInput(List<IntermediateOperation> inputs, Context context, Tensor x, String name) {
        if (x == null) return null;
        context.put(name, new TensorValue(x));
        IntermediateOperation op = new Constant(modelName, name, OrderedTensorType.fromSpec(x.type().toString()));
        op.setConstantValueFunction(type -> new TensorValue(convertTypeAfterRename(x, type)));
        inputs.add(op);
        return op;
    }
Unit tests for ONNX operators. The number on the test reflects the minimum
opset number for the operations tested.

@author lesters
model-integration/src/test/java/ai/vespa/rankingexpression/importer/onnx/OnnxOperationsTestCase.java