What does sufixs K, T, W mean?

[adinvadim]

I didn't find doc or arcticle about this. I want to understand fp-ts deeper.

I intuitively got, that "W" - it is mean "less strict", when one of generics accumulate result.

What I can read and study on this topiс?

[samhh]

They're described here.

[adinvadim]

Thank you!