Thanks for your work.
Yuriy Yazlovytskyy

Hi Yuriy!

Since the laws can be expressed in terms of sequence or traverse (see, fantasyland chose the simpler of the two.

One can define sequence in terms of traverse and vice versa:
const sequence = (of, x)=> x.traverse(of, id)

const traverse = (of, f, x)=>

It used to be there, but was removed recently. Good eye!

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