[Flutter] Paging data from database and network in Flutter

I'm pretty new to Flutter development, coming from an Android background. I want to implement the following pattern like it is commenly used with the Paging 3 jetpack library:

UI <-------> Repo --- Out of data ---> Network
^ |
| |
---------- Save ------------


I also want to support paging in both directions. Anything I have seen so far on pub.dev is only paging in one direction. Do I have to implement this pattern for myself or is there already a library for this?

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