HashSet<String> sys = new HashSet<>(invokerRequest.systemProperties().keySet());
        invokerRequest.userProperties().entrySet().stream()
                .filter(k -> !sys.contains(k.getKey()))
                .forEach(k -> System.setProperty(k.getKey(), k.getValue()));
        System.setProperty(
                Constants.MAVEN_HOME, invokerRequest.installationDirectory().toString());
    }

    return big.bitLength() <= 31;
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullPointers() {
    NullPointerTester tester = new NullPointerTester();
    tester.setDefault(int.class, 1);
    tester.testAllPublicStaticMethods(IntMath.class);
  }

  @GwtIncompatible // isPrime is GWT-incompatible
  public void testIsPrime() {
    // Defer correctness tests to Long.isPrime

    assertNull("put(null, null) should return null", put(nullKeyValueEntry));
    expectAdded(nullKeyValueEntry);
  }

  @CanIgnoreReturnValue
  private V put(Entry<K, V> entry) {
    return getMap().put(entry.getKey(), entry.getValue());
  }

  /**
   * Returns the {@link Method} instance for {@link #testPut_nullKeyUnsupported()} so that tests of
   * {@link java.util.TreeMap} can suppress it with {@code

            final PDComplexFileSpecification spec = ent.getValue();
            if (spec != null) {
                final PDEmbeddedFile embeddedFile = getEmbeddedFile(spec);
                extractFile(ent.getKey(), embeddedFile, writer);
            }
        }
    }

    protected PDEmbeddedFile getEmbeddedFile(final PDComplexFileSpecification fileSpec) {

 */
@GwtCompatible(emulated = true)
public class FluentIterableTest extends TestCase {

  @GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(FluentIterable.class);
  }

  public void testFromArrayAndAppend() {
    FluentIterable<TimeUnit> unused = FluentIterable.from(TimeUnit.values()).append(SECONDS);
  }

                if (headerFieldMap != null) {
                    for (final Map.Entry<String, List<String>> entry : headerFieldMap.entrySet()) {
                        responseData.addMetaData(entry.getKey(), entry.getValue());
                    }
                }

                if (file.canRead()) {
                    final MimeTypeHelper mimeTypeHelper = crawlerContainer.getComponent("mimeTypeHelper");

    @Override
    protected BiMap<String, String> create(Entry<String, String>[] entries) {
      BiMap<String, String> result = HashBiMap.create();
      for (Entry<String, String> entry : entries) {
        result.put(entry.getKey(), entry.getValue());
      }
      return result;
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // suite
  public static Test suite() {
    TestSuite suite = new TestSuite();
    suite.addTest(

      for (int i = 0; i < expected.length; i++) {
        assertEquals(expected[i], got[i]);
      }
    }
  }

  // Assumes that AbstractNonStreamingHashFunction works properly (must be tested elsewhere!)
  private static class Control extends AbstractNonStreamingHashFunction {
    @Override
    public HashCode hashBytes(byte[] input, int off, int len) {

                        Binding<?> b = new BindingToBeanEntry<>(valueType)
                                .toBeanEntry(bean)
                                .prioritize(bean.getRank());
                        String name = bean.getKey() instanceof com.google.inject.name.Named n ? n.value() : "";
                        map.compute(name, (n, ob) -> ob == null || ob.getPriority() < b.getPriority() ? b : ob);
                    }
                }

You also get error checks for incorrect type operations:

<img src="/img/tutorial/body/image04.png">

This is not by chance, the whole framework was built around that design.

And it was thoroughly tested at the design phase, before any implementation, to ensure it would work with all the editors.

There were even some changes to Pydantic itself to support this.