### Question:
Gvl implements com.iabtcf.extras.gvl.Gvl { @Override public int getTcfPolicyVersion() { return tcfPolicyVersion; }  @Override int getGvlSpecificationVersion(); @Override int getVendorListVersion(); @Override int getTcfPolicyVersion(); @Override Instant getLastUpdated(); @Override List<Purpose> getPurposes(); @Override List<SpecialPurpose> getSpecialPurposes(); @Override List<Feature> getFeatures(); @Override List<SpecialFeature> getSpecialFeatures(); @Override List<Stack> getStacks(); @Override List<Vendor> getVendors(); @Override Vendor getVendor(int vendorId);  }### Answer:
@Test public void testGetTcfPolicyVersion() { Assert.assertEquals(2, gvl.getTcfPolicyVersion()); }