I have the following ``` class Face { ...

# getting-started

[elect]

I have the following

class Face {
            var n = Vec3()
            var d = 0f
            val c = Array(3, { <http://GJK.SV|GJK.SV>() })
            val f = Array<Face?>(3, { null })
            val l = Array<Face?>(2, { null })
        }

        class List(var root: Face? = null, var count: Int = 0)

But if I type list.root?.l.set(0, face) it complains on l

Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Array<GjkEpaSolver3.EPA.Face?>?