int exit = MavenUpCling.main(
                new String[] {"--help"},
                new ClassWorld("plexus.core", Thread.currentThread().getContextClassLoader()),
                null,
                out,
                err);

        String help = out.toString(StandardCharsets.UTF_8);
        assertEquals(0, exit, "mvnup --help should exit 0");
        assertTrue(

        protected Pair<String, String> splitField(final String defaultField, final String field) {
            final int indexOf = field.indexOf(':');
            if (indexOf < 0) {
                return new Pair<>(field, null);
            }
            final String indexField = indexOf == 0 ? defaultField : field.substring(0, indexOf);
            final String extensionKey = field.substring(indexOf + 1);

                chain.request(),
              )
            responsesNotClosed.add(response)
            response
              .newBuilder()
              .body("unrelated response body!".toResponseBody(null))
              .build()
          },
        ).build()
    server.enqueue(
      MockResponse(
        code = 301,
        headers = headersOf("Location", "/b"),
        body = "/a has moved!",

        public List<String> commandInfo(String command) {
            return List.of();
        }

        @Override
        public CmdDesc commandDescription(List<String> args) {
            return null;
        }

        @Override
        public String name() {
            return "Builtin Maven Shell commands";
        }

        private void shell(CommandInput input) {

    assertThrows(UnsupportedOperationException.class, () -> sortedMultiset.pollFirstEntry());
  }

  @CollectionSize.Require(SEVERAL)
  public void testLower() {
    resetWithHole();
    assertEquals(null, sortedMultiset.headMultiset(a.getElement(), OPEN).lastEntry());
    assertEquals(a, sortedMultiset.headMultiset(b.getElement(), OPEN).lastEntry());
    assertEquals(a, sortedMultiset.headMultiset(c.getElement(), OPEN).lastEntry());

      new Predicate<Entry<String, String>>() {
        @Override
        public boolean apply(Entry<String, String> entry) {
          return entry.getKey() != null && entry.getValue() != null;
        }
      };

  private static class NonNavigableSortedSet extends ForwardingSortedSet<String> {

    private final SortedSet<String> delegate = Sets.newTreeSet(Ordering.natural());

  }

  public void testEncloseAll_nullValue() {
    List<@Nullable Integer> nullFirst = Lists.newArrayList(null, 0);
    assertThrows(NullPointerException.class, () -> Range.encloseAll((List<Integer>) nullFirst));
    List<@Nullable Integer> nullNotFirst = Lists.newArrayList(0, null);
    assertThrows(NullPointerException.class, () -> Range.encloseAll((List<Integer>) nullNotFirst));
  }

     *
     * @see org.apache.maven.plugin.Mojo#getLog()
     * @deprecated Use SLF4J directly
     */
    @Deprecated
    @Override
    public Log getLog() {
        if (log == null) {
            log = new SystemStreamLog();
        }

        return log;
    }

    @Override
    public Map getPluginContext() {
        return pluginContext;
    }

    @Override

            assertEquals("modified_after_put", wrapper.getProperty("key1"));

            // Test remove() method
            wrapper.remove("key2");
            assertEquals(null, wrapper.getProperty("key2"));

            // Simulate external change
            Properties externalProps2 = new Properties();
            externalProps2.setProperty("key1", "modified_after_remove");

  }

  @Override
  public @Nullable E edgeConnectingOrNull(N nodeU, N nodeV) {
    Set<E> edgesConnecting = edgesConnecting(nodeU, nodeV);
    switch (edgesConnecting.size()) {
      case 0:
        return null;
      case 1:
        return edgesConnecting.iterator().next();
      default:
        throw new IllegalArgumentException(String.format(MULTIPLE_EDGES_CONNECTING, nodeU, nodeV));
    }
  }

  @Override