Hi, I am wondering what the decortator is for the following usecase: I have an asset which outputs a pandas dataframe - sorted by 'col1' , and on materialisation, I want a function which is triggered by the asset which sorts by 'col2' and saves the newly created dataframe. This doesn't seem like an asset - more like an op, but currently I am handling this using assets. How should a funciton with no dependancies be written in dagster?

where is this data persisted? https://dagster.io/blog/thinking-in-assets might be a helpful read too