boolean unknownDimensionSize() {
            return hasSymbolicName() || size <= 0;
        }
Return the tensor type for an ONNX model for the given context.
An ONNX model can have dynamic/symbolic dimension sizes. If so, the output
type depends on the input types for the given context (rank profile).
config-model/src/main/java/com/yahoo/vespa/model/ml/OnnxModelInfo.java