*   <li>It is easy for the user to ensure that listeners are never invoked while holding locks.
 * </ul>
 *
 * The last point is subtle. Often the observable object will be managing its own internal state
 * using a lock, however it is dangerous to dispatch listeners while holding a lock because they
 * might run on the {@code directExecutor()} or be otherwise re-entrant (call back into your

 *   <li>It is easy for the user to ensure that listeners are never invoked while holding locks.
 * </ul>
 *
 * The last point is subtle. Often the observable object will be managing its own internal state
 * using a lock, however it is dangerous to dispatch listeners while holding a lock because they
 * might run on the {@code directExecutor()} or be otherwise re-entrant (call back into your

     * @param externalRepositories The external (and already mirrored) repositories to merge into the result list, may
     *            be {@code null}.
     * @param request The project building request holding further settings like repository settings, must not be
     *            {@code null}.
     * @return The effective artifact repositories, never {@code null}.
     * @throws InvalidRepositoryException
     */

 *
 * @since 4.0.0
 */
@Experimental
public interface ArtifactFactory extends Service {

    /**
     * Creates an artifact.
     *
     * @param request the request holding artifact creation parameters
     * @return an {@code Artifact}, never {@code null}
     * @throws IllegalArgumentException if {@code request} is null or {@code request.session} is null or invalid
     */
    @Nonnull

 */
@Deprecated(since = "4.0.0")
public interface ProjectDependenciesResolver {

    /**
     * Resolves the transitive dependencies of a project.
     *
     * @param request The resolution request holding the parameters, must not be {@code null}.
     * @return The resolution result, never {@code null}.
     * @throws DependencyResolutionException If any project dependency could not be resolved.
     */

        <![CDATA[
    <interactiveMode>true</interactiveMode>
    ]]></configuration>
      <description>
        <![CDATA[
      If false, flags the system to skip prompting the user for any information, or holding up the build
      waiting for any input.

      NOTE: It's also possible to switch to batch (i.e. non-interactive) mode using the '-B' command-line option.
    ]]></description>
    </expression>
  </expressions>

        "value (%s) is outside the range for an unsigned integer value",
        value);
    return fromIntBits(value.intValue());
  }

  /**
   * Returns an {@code UnsignedInteger} holding the value of the specified {@code String}, parsed as
   * an unsigned {@code int} value.
   *
   * @throws NumberFormatException if the string does not contain a parsable unsigned {@code int}
   *     value
   */

### Holding multiple locks

You're allowed to take the Http2Connection lock while holding the Http2Writer lock. But not vice-versa. Because taking the Http2Writer lock can block.

        "value (%s) is outside the range for an unsigned long value",
        value);
    return fromLongBits(value.longValue());
  }

  /**
   * Returns an {@code UnsignedLong} holding the value of the specified {@code String}, parsed as an
   * unsigned {@code long} value.
   *
   * @throws NumberFormatException if the string does not contain a parsable unsigned {@code long}
   *     value
   */

 *
 * @since 4.0.0
 */
@Experimental
public interface ArtifactCoordinatesFactory extends Service {

    /**
     * Creates artifact coordinates.
     *
     * @param request the request holding coordinates creation parameters
     * @return an {@code ArtifactCoordinates}, never {@code null}
     * @throws IllegalArgumentException if {@code request} is null or {@code request.session} is null or invalid
     */