* @throws IllegalArgumentException if {@code edge} already exists in the network and connects
     *     some other endpoint pair that is not equal to {@code endpoints}
     * @throws IllegalArgumentException if the introduction of the edge would violate {@link
     *     #allowsParallelEdges()} or {@link #allowsSelfLoops()}
     * @throws IllegalArgumentException if the endpoints are unordered and the network is directed

     * @throws IllegalArgumentException if {@code edge} already exists in the network and connects
     *     some other endpoint pair that is not equal to {@code endpoints}
     * @throws IllegalArgumentException if the introduction of the edge would violate {@link
     *     #allowsParallelEdges()} or {@link #allowsSelfLoops()}
     * @throws IllegalArgumentException if the endpoints are unordered and the network is directed

  /**
   * Returns a {@code ContiguousSet} containing the same values in the given domain {@linkplain
   * Range#contains contained} by the range.
   *
   * @throws IllegalArgumentException if neither range nor the domain has a lower bound, or if
   *     neither has an upper bound
   * @since 13.0
   */
  public static <C extends Comparable> ContiguousSet<C> create(

        logLevelRecorder.record(Level.ERROR);

        assertTrue(logLevelRecorder.metThreshold());
    }

    @Test
    void failsOnLowerThanWarn() {
        assertThrows(IllegalArgumentException.class, () -> new LogLevelRecorder("INFO"));
    }

    @Test
    void createsLogLevelRecorderWithWarning() {
        LogLevelRecorder logLevelRecorder = new LogLevelRecorder("WARNING");

          ToOptionalState::getOptional,
          Collector.Characteristics.UNORDERED);

  /**
   * A collector that converts a stream of zero or one elements to an {@code Optional}.
   *
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be

    try {
      multiset.add(entry.getElement(), entry.getCount());
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
    }

    try {
      multiset.add(entry.getElement());
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
    }

    try {
      multiset.addAll(Collections.singletonList(entry.getElement()));

 */
@Experimental
public interface ArtifactInstaller extends Service {
    /**
     * @param request {@link ArtifactInstallerRequest}
     * @throws ArtifactInstallerException in case of an error
     * @throws IllegalArgumentException in case {@code request} is {@code null}
     */
    void install(@Nonnull ArtifactInstallerRequest request);

    /**
     * @param session the repository session

      if (isNullOrEmpty(value)) {
        throw new IllegalArgumentException("value of key " + key + " omitted");
      }
      try {
        parseInteger(spec, Integer.parseInt(value));
      } catch (NumberFormatException e) {
        throw new IllegalArgumentException(
            format("key %s value set to %s, must be integer", key, value), e);
      }
    }
  }

      if (isNullOrEmpty(value)) {
        throw new IllegalArgumentException("value of key " + key + " omitted");
      }
      try {
        parseInteger(spec, Integer.parseInt(value));
      } catch (NumberFormatException e) {
        throw new IllegalArgumentException(
            format("key %s value set to %s, must be integer", key, value), e);
      }
    }
  }

        assertFalse(rtInfo.isMavenVersion("[9.0,)"));

        assertThrows(
                IllegalArgumentException.class,
                () -> rtInfo.isMavenVersion("[3.0,"),
                "Bad version range wasn't rejected");

        assertThrows(
                IllegalArgumentException.class, () -> rtInfo.isMavenVersion(""), "Bad version range wasn't rejected");

        assertThrows(