### Question:
GeoJsonRenderer extends Renderer implements Observer { public void removeLayerFromMap() { if (isLayerOnMap()) { for (Feature feature : super.getFeatures()) { removeFromMap(super.getAllFeatures().get(feature)); feature.deleteObserver(this); } setLayerVisibility(false); } } GeoJsonRenderer(GoogleMap map, HashMap<GeoJsonFeature, Object> features, MarkerManager markerManager, PolygonManager polygonManager, PolylineManager polylineManager, GroundOverlayManager groundOverlayManager); void setMap(GoogleMap map); void addLayerToMap(); void addFeature(GeoJsonFeature feature); void removeLayerFromMap(); void removeFeature(GeoJsonFeature feature); void update(Observable observable, Object data);  }### Answer:
@Test public void testRemoveLayerFromMap() throws Exception { mLayer = new GeoJsonLayer(mMap1, createFeatureCollection()); mRenderer.removeLayerFromMap(); assertEquals(mMap1, mRenderer.getMap()); }