ishiy1993

Support Optional

1

https://github.com/onnx/onnx/blob/main/docs/Operators.md#Optional

https://github.com/onnx/onnx/blob/main/docs/Operators.md#multinomial

https://github.com/onnx/onnx/blob/main/docs/Operators.md#meanvariancenormalization

https://github.com/onnx/onnx/blob/main/docs/Operators.md#maxunpool

https://github.com/onnx/onnx/blob/main/docs/Operators.md#maxroipool

https://github.com/onnx/onnx/blob/main/docs/Operators.md#maxpool

https://github.com/onnx/onnx/blob/master/docs/Operators.md#lppool

https://github.com/onnx/onnx/blob/master/docs/Operators.md#lpnormalization

https://github.com/onnx/onnx/blob/master/docs/Operators.md#LSTM

https://github.com/onnx/onnx/blob/master/docs/Operators.md#LRN