<Unresolved reference: getInstance [kotlin android...

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[user]

Unresolved reference: getInstance [kotlin android studio]
getInstance of kotlin is showing error as "Unresolved reference: getInstance" in MainActivity.kt.
I am trying to implement singleton but getInstance is not working. Maybe something wrong in this line "MySingleton.getInstance(this).addToRequestQueue(jsonObjectRequest)" in MainActivity.kt.
MainActivity.kt
package com.example.newstube

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import androidx.recyclerview.widget.LinearLayoutManager...