// Group archived keys by session
        for (String key : sessionKeys.keySet()) {
            if (key.contains(".v")) {
                String baseSession = key.substring(0, key.indexOf(".v"));
                sessionArchives.computeIfAbsent(baseSession, k -> new java.util.ArrayList<>()).add(key);
            }
        }

        // Remove old versions
        int removed = 0;

    private final String string;

    StringAsImmutableList(String string) {
      this.string = string;
    }

    @Override
    public int indexOf(@Nullable Object object) {
      return (object instanceof Character) ? string.indexOf((Character) object) : -1;
    }

    @Override
    public int lastIndexOf(@Nullable Object object) {

        for (User user : users) {
            chain.update(user);
            chain.changePassword(user.getName(), "newpass" + user.getName());
            chain.load(user);
            if (users.indexOf(user) % 2 == 0) {
                chain.delete(user);
            }
        }

        // Verify all operations were tracked
        assertEquals(10, chain.updateCalls.size());

            System.clearProperty(Constants.FESS_CONF_PATH);
        }

        List<String> cmdList = mockProcessHelper.getLastCommandList();
        if (cmdList != null) {
            int cpIndex = cmdList.indexOf("-cp");
            if (cpIndex >= 0 && cpIndex + 1 < cmdList.size()) {
                String classpath = cmdList.get(cpIndex + 1);
                assertTrue(classpath.contains(confPath));
            }
        }

        /*
         * try { ArtifactResolutionResult res = collect( a ); fail( "Expected b not to resolve: " + res ); } catch (
         * OverConstrainedVersionException e ) { assertTrue( e.getMessage().indexOf( "[1.0-SNAPSHOT]" ) <
         * e.getMessage().indexOf( "[1.0,)" ) ); }
         */
    }

    @Test
    @Disabled("that one does not work")
    @SuppressWarnings("checkstyle:UnusedLocalVariable")

     * @return the canonical session ID (portion before first hyphen, or original if no hyphen)
     */
    public String getCanonicalSessionId(final String sessionId) {
        final int idx = sessionId.indexOf('-');
        if (idx >= 0) {
            return sessionId.substring(0, idx);
        }
        return sessionId;
    }

    /**
     * Stores crawling information and parameters for the specified session.

        } catch (final IOException e) {
            throw new DictionaryException("Failed to parse " + path, e);
        }
    }

    private String unescape(final String s) {
        if (s.indexOf('\\') >= 0) {
            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.length(); i++) {
                final char ch = s.charAt(i);
                if (ch == '\\' && i < s.length() - 1) {

        int ci;

        if (username != null) {
            ci = username.indexOf('@');
            if (ci > 0) {
                domain = username.substring(ci + 1);
                username = username.substring(0, ci);
            } else {
                ci = username.indexOf('\\');
                if (ci > 0) {
                    domain = username.substring(0, ci);

    assertTrue(list.contains("the"));
    assertEquals(2, list.indexOf("the"));
    assertEquals(2, list.lastIndexOf("the"));
    assertFalse(list.contains("dog"));
    assertEquals(-1, list.indexOf("dog"));
    assertEquals(-1, list.lastIndexOf("dog"));
    assertFalse(list.contains("chicken"));
    assertEquals(-1, list.indexOf("chicken"));
    assertEquals(-1, list.lastIndexOf("chicken"));
  }

    List<E> expected = copyToList(getSampleElements());
    expected.addAll(index, elements);
    expectContents(expected);
  }

  /*
   * TODO: if we're testing a list, we could check indexOf(). (Doing it in
   * AbstractListTester isn't enough because many tests that run on lists don't
   * extends AbstractListTester.) We could also iterate over all elements to
   * verify absence
   */