### Question:
GeoJsonRenderer extends Renderer implements Observer { public void removeFeature(GeoJsonFeature feature) { super.removeFeature(feature); if (super.getFeatures().contains(feature)) { feature.deleteObserver(this); } } 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 testRemoveFeature() { mRenderer.addFeature(mGeoJsonFeature); mRenderer.removeFeature(mGeoJsonFeature); assertFalse(mRenderer.getFeatures().contains(mGeoJsonFeature)); }