### Question:
Stack implements com.iabtcf.extras.gvl.Stack { @Override public String getDescription() { return description; }  @Override int getId(); @Override List<Integer> getSpecialFeatures(); @Override List<Integer> getPurposes(); @Override String getName(); @Override String getDescription();  }### Answer:
@Test public void testGetDescription() { String expectedDescription = "Ad and content performance can be measured. Insights about the audiences who saw the ads and content can be derived. Data can be used to build or improve user experience, systems, and software. Insights about the audiences who saw the ads and content can be derived."; Assert.assertEquals(expectedDescription, stackTwenty.getDescription()); }