/**
     * Smooth moving my location marker arrow
     * @param marker - marker itself
     * @param newLatLng - new location to move
     */
    private fun changePositionSmoothly(marker: Marker?, newLatLng: LatLng) {
        if (marker == null) {
            return
        }
        val animation = ValueAnimator.ofFloat(0f, 100f)
        var previousStep = 0f
        val deltaLatitude = newLatLng.latitude - marker.position.latitude
        val deltaLongitude = newLatLng.longitude - marker.position.longitude
        animation.duration = 1000
        animation.addUpdateListener { updatedAnimation ->
            val deltaStep = updatedAnimation.animatedValue as Float - previousStep
            previousStep = updatedAnimation.animatedValue as Float
            marker.position = LatLng(marker.position.latitude + deltaLatitude * deltaStep * 1 / 100, marker.position.longitude + deltaStep * deltaLongitude * 1 / 100)
        }
        animation.start()
    }