Classifier does not have a companion object, and thus must be initialized here

Question

I have an Activity where an interface is declared and I have a ViewModel class which has overridden interface and want to invoke the method of interface from Activity to make changes in ViewModel class but unable to call method in Activity saying ViewModel class does not have a companion object, and thus must be initialized here. How to resolve this?

var selection: setSelectionSubRow? = null
    selection=RowSubTShirtViewModel
    selection!!.setNameSelection(false)

above code is in Activity whose name is TShirtActivity.

below code is from RowViewModel class

class RowSubTShirtViewModel(private val subTShirtAdapter: SubTShirtAdapter, val context: TShirtActivity,
                        val tShirtBean: CommonItemBean, private val parentPosition: Int, private val position: Int) : BaseObservable() ,TShirtActivity.setSelectionSubRow{

fun getImageDrawable(): Drawable {
    return if (tShirtBean.isSelected)
        ContextCompat.getDrawable(context, R.drawable.green_border_circle)!!
    else
        ContextCompat.getDrawable(context, R.drawable.border_circle)!!
}

override fun setNameSelection(selection: Boolean) {
    if (parentPosition == 6) {
        if (position == 1) {
            tShirtBean.isSelected = false
        }
    }
}

Answer 1

This line selection=RowSubTShirtViewModel references the view model as if it were a named object, meaning you would have written instead of class object:

object RowSubTShirtViewModel {
   //...
}

However, since that's not the case, kotlin is telling you that you cannot reference it like that and must initialize it. The constructor as quite a lot of parameters for me to guess what they are, but essentially you'd have to pass them in:

selection=RowSubTShirtViewModel(/*parameters here*/)