<@UEU1NDQCD> <https://github.com/arrow-kt/arrow/pu...

# arrow-contributors

[pakoito]

@Imran/Malic https://github.com/arrow-kt/arrow/pull/1509#issuecomment-509267111

Good job with FunctorFilter! Let’s do the others now 😄

[Imran/Malic]

@raulraja What is your opinion about the transfer from MonadFilter, TraverseFilter and MonadCombine ?

[raulraja]

It's fine, thought we were doing FunctorFilter first but those need to be relocated to for AQL Fx integration

[Imran/Malic]

so MonadFilter, TraverseFilter and MonadCombine should be in core right?

[raulraja]

They can be in core but then we are leaving MTL to be teared appart like we did in Extras because that I can think MonadReader, MonadWriter etc… are not used at all and we never had questions or anything about those in the community

[raulraja]

I also think they have little value given you can do DI with receivers an soon type classes which is much more performant than MonadReader etc.

[Imran/Malic]

Agree. Maybe we can discuss this at a later point. @pakoito I can create an issue for that if you agree ?

[pakoito]

We agreed splitting MTL this way on one of the meetings. Keep the RWS on a package, and XFilter/Combine and other non-RWS typeclasses back to core

[pakoito]

maybe rename arrow-mtl to arrow-rws

[pakoito]

(Read Write State)

[raulraja]

@Imran/Malic I guess we can move those too now

[raulraja]

We should probably wait on renaming until we see what's left behind

[Imran/Malic]

I am on it 👌🏽

[Imran/Malic]

here is the PR: https://github.com/arrow-kt/arrow/pull/1511