docs: private void initLayer(String belowLayer) {
      light = style.getLight();
      fillExtrusionLayer = new FillExtrusionLayer(LAYER_ID, "composite");
      fillExtrusionLayer.setSourceLayer("building");
      fillExtrusionLayer.setMinZoom(minZoomLevel);
      fillExtrusionLayer.setProperties(
        visibility(visible ? VISIBLE : NONE),
        fillExtrusionColor(color),
        fillExtrusionHeight(
          interpolate(
            exponential(1f),
            zoom(),
            stop(15, literal(0)),
            stop(16, get("height"))
          )
        ),
        fillExtrusionOpacity(opacity)
      );
      addLayer(fillExtrusionLayer, belowLayer);
    }