ShowPolyline.kt

override fun onCreate(savedInstanceState: Bundle?) {
  //map init code..
  
  val path = createDummyPath()
  val lineOnMap = showPathOnMap(path)
}

private fun showPathOnMap(path: List<Radio>) : Line {
    val lineOptions = LineOptions()
        .withLineColor("#3949AB")
        .withLineWidth(5f)
        .withLatLngs(path)

    return lineManager.create(lineOptions)
}