### Question:
IntegerToDoubleConverter implements Converter<Integer, Double> { @Override public Class<Double> getComponentType() { return Double.class; }  @Override Class<Integer> getModelType(); @Override Class<Double> getComponentType(); @Override Integer toModelValue(Double widgetValue); @Override Double toWidgetValue(Integer modelValue);  }### Answer:
@Test public void testGetComponentType() { Class componentType = converter.getComponentType(); assertEquals(Double.class, componentType); }