Analog for RxJS do?

Is there a Kefir analog to RxJS do? I’m trying to invoke an arbitrary action after returning from .map

Edit: Here is the docs for do

https://github.com/Reactive-Extensions/RxJS/blob/master/doc/api/core/operators/do.md

Thanks

[rpominov]

I still don’t understand what the issue is. Here is the full example:

const source = Kefir.sequentially(0, [1, 2, 3]);;
//transparently log values from source with 'do'
const example = source
  .map(val => {console.log(`BEFORE MAP: ${val}`); return val})
  .map(val => val + 10)
  .map(val => {console.log(`AFTER MAP: ${val}`); return val});
//'do' does not transform values
//output: 11...12...13...14...15
const subscribe = example.observe(val => console.log(val));

[spro]

Are you looking for onValue?