fun conv2d(input: Tensor<*, *>, weight: Tensor<*, *>, bias: Tensor<*, *>?, result: Tensor<*, *>, stride: Pair<Int, Int>, padding: Pair<Int, Int>, dilation: Pair<Int, Int>, groups: Int): Map<String, Any?>(source) Conv2d op attributes: shapes/dtypes + stride/padding/dilation/groups and bias flag.