return delegate!!.isValid
  }

  override fun putValue(
    s: String,
    o: Any,
  ) {
    delegate!!.putValue(s, o)
  }

  override fun getValue(s: String): Any {
    return delegate!!.getValue(s)
  }

  override fun removeValue(s: String) {
    delegate!!.removeValue(s)
  }

  override fun getValueNames(): Array<String> {
    return delegate!!.valueNames
  }

    s: String,
    obj: Any,
  ) {
    throw UnsupportedOperationException()
  }

  override fun removeValue(s: String) {
    throw UnsupportedOperationException()
  }

  override fun getValue(s: String): Any {
    throw UnsupportedOperationException()
  }

  override fun getValueNames(): Array<String> {
    throw UnsupportedOperationException()
  }

  override fun invalidate() {