private static boolean isArgumentTensor(String name, Onnx.GraphProto graph) {
        Onnx.ValueInfoProto value = getArgumentTensor(name, graph);
        Onnx.TensorProto tensor = getConstantTensor(name, graph);
        return value != null && tensor == null;
    }
Converts an ONNX graph to a Vespa IntermediateGraph which is the basis
for generating Vespa ranking expressions.

@author lesters
model-integration/src/main/java/ai/vespa/rankingexpression/importer/onnx/GraphImporter.java