it isn´t able to resolve it

# arrow

[carbaj0]

it isn´t able to resolve it

[simon.vergauwen]

arrow.optics.extensions.list.index.List aand that has an index() available if you're using kotlin.collections.List. This is for 0.11.0 but it's all been improved for the next verisons.

For this instance you need to use ListK.

Or what is unable to resolve?

[simon.vergauwen]

IDEA is suggestion an import there, is that not the correct one?

[pakoito]

^^^^