about causal conv

[HHHKKKHHH]

I note that the convolution used in the original paper is causal convolution, but I don't seem to see an implementation of causal convolution in this project.
A common grouping convolution is used in model.py. I wonder if this is correct

[johnma2006]

That part is here: https://github.com/johnma2006/mamba-minimal/blob/master/model.py#L185
For reference: https://github.com/Dao-AILab/causal-conv1d