### Question:
ElementViewManager extends ViewGroupManager<Element> { @Override public void onDropViewInstance(Element element) { super.onDropViewInstance(element); unregister(element); }  @Override String getName(); Element createView(ThemedReactContext reactContext); @Override void onDropViewInstance(Element element); @ReactProp(name = "elementId") void setElementId(Element element, String id); @Override boolean needsCustomLayoutForChildren();  }### Answer:
@Test public void onDropViewInstance() { uut.onDropViewInstance(view); verify(parentView).unregisterElement(view); }