### Argument Validation

Use `AssertionUtil` at method entry:
- `AssertionUtil.assertArgumentNotNull("argName", value)`
- `AssertionUtil.assertArgumentNotEmpty("argName", value)`

### Exception Handling

- Wrap checked exceptions in runtime exceptions from `org.codelibs.core.exception`
- Use error codes (e.g., "ECL0008" = null argument)

### Test Structure

- JUnit 4 + Hamcrest matchers
- Test class: `{ClassName}Test.java`

 * it become necessary to introduce new parameters in the existing callbacks in the future.
 * </p>
 * <strong>Note:</strong> This class is part of work in progress and can be changed or removed without notice.
 *
 * @see MojoExecutionListener
 * @see org.apache.maven.execution.scope.WeakMojoExecutionListener
 * @since 3.1.2
 */
public class MojoExecutionEvent {

 * should it become necessary to introduce new parameters in the existing callbacks in the future.
 * </p>
 * <strong>Note:</strong> This class is part of work in progress and can be changed or removed without notice.
 *
 * @see ProjectExecutionListener
 * @since 3.1.2
 */
public class ProjectExecutionEvent {

    private final MavenSession session;

    private final MavenProject project;

  public void testAddAllWithEmptyIterator() {
    List<String> alreadyThere = Lists.newArrayList("already", "there");

    boolean changed = Iterators.addAll(alreadyThere, Iterators.<String>emptyIterator());
    assertThat(alreadyThere).containsExactly("already", "there").inOrder();
    assertFalse(changed);
  }

  public void testAddAllToList() {
    List<String> alreadyThere = Lists.newArrayList("already", "there");

   *
   * - https://github.com/jspecify/jdk/commit/71d826792b8c7ef95d492c50a274deab938f2552
   */
  /*
   * TODO(cpovirk): Is the unchecked cast avoidable? Would System.arraycopy be similarly fast (if
   * likewise not type-checked)? Could our single caller do something different?
   */
  @SuppressWarnings({"nullness", "unchecked"})
  static <T extends @Nullable Object> T[] copy(Object[] source, int from, int to, T[] arrayOfType) {

   * - https://github.com/jspecify/jdk/commit/71d826792b8c7ef95d492c50a274deab938f2552
   */
  /*
   * TODO(cpovirk): Is the unchecked cast avoidable? Would System.arraycopy be similarly fast (if
   * likewise not type-checked)? Could our single caller do something different?
   */
  @SuppressWarnings({"nullness", "unchecked"})
  static <T extends @Nullable Object> T[] copy(Object[] source, int from, int to, T[] arrayOfType) {

            if (longValue > Integer.MAX_VALUE) {
                return null;
            }
            return (int) longValue;
        } catch (NumberFormatException e) {
            // should never happen since checked isDigits(s) before
            return null;
        }
    }

    @Override
    public String toString() {
        return comparable.toString();
    }

            throws ArtifactDeploymentException {
        if (artifact.isSnapshot()) {
            Snapshot snapshot = new Snapshot();

            // TODO Should this be changed for MNG-6754 too?
            snapshot.setTimestamp(getDeploymentTimestamp());

            // we update the build number anyway so that it doesn't get lost. It requires the timestamp to take effect
            try {

                println("NullAway enabled in ${enabledCount} ${projectS(enabledCount)}.")

                if (projectsToEnableNullaway.isNotEmpty()) {
                    println("${toEnableCount} ${projectS(toEnableCount)} with checked dependencies are ready to be worked on:")
                    projectsToEnableNullaway.sorted().forEach {
                        println("  * $it")
                    }

  @Override
  protected void tearDown() throws Exception {

    // Make sure we have no waiting threads.
    latch.countDown();
  }

  /** Constructs a listenable future with a value available after the latch has counted down. */
  protected abstract <V> ListenableFuture<V> createListenableFuture(
      V value, @Nullable Exception except, CountDownLatch waitOn);