class A1 : ArrayList<String> {
  constructor() /* primary */ {
    super/*ArrayList*/<@FlexibleNullability String?>()
    /* <init>() */

  }

}

class A2 : ArrayList<String> {
  constructor() /* primary */ {
    super/*ArrayList*/<@FlexibleNullability String?>()
    /* <init>() */

  }

  override fun remove(x: String): Boolean {
    return true
  }

}