Exclude certain Groupie Items from spacing item decoration

ExampleFragment.kt

recyclerView.addItemDecoration(
    LinearSpacingItemDecoration(
        spacingInPixels = resources.getDimensionPixelSize(R.dimen.item_spacing),
        excludeItem = { item ->
            item is RadioButtonItem || item is CheckBoxItem
        }
    )
)

LinearSpacingItemDecoration.kt

class LinearSpacingItemDecoration(
    private val spacingInPixels: Int,
    private val orientation: Orientation = Orientation.Vertical,
    private val excludeItem: ((item: Item) -> Boolean)? = null
) : RecyclerView.ItemDecoration() {

    override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
        super.getItemOffsets(outRect, view, parent, state)

        val adapterPosition = parent.getChildAdapterPosition(view)

        if (adapterPosition <= 0) {
            return
        }

        if (excludeItem != null) {
            val adapter = parent.adapter as GroupAdapter
            val item = adapter.getItem(adapterPosition) as Item
            if (excludeItem.invoke(item)) {
                return
            }
        }

        when (orientation) {
            is Orientation.Horizontal -> outRect.left = spacingInPixels
            is Orientation.Vertical -> outRect.top = spacingInPixels
        }
    }

    sealed class Orientation {
        object Horizontal : Orientation()
        object Vertical : Orientation()
    }
}