<relativePath>../pom.xml</relativePath>
                    </parent>
                    <artifactId>child-project</artifactId>
                    <!-- No explicit groupId - will inherit from parent -->
                    <!-- No explicit version - will inherit from parent -->
                </project>
                """;

            Document parentDoc = Document.of(parentPomXml);

    /**
     * Gets the identifiers of those profiles that should be activated by explicit demand.
     *
     * @return The identifiers of those profiles to activate, never {@code null}.
     */
    List<String> getActiveProfileIds();

    /**
     * Sets the identifiers of those profiles that should be activated by explicit demand.
     *

    new EqualsTester()
        .addEqualityGroup(c, Ordering.explicit(42, 5))
        .addEqualityGroup(Ordering.explicit(5, 42))
        .addEqualityGroup(Ordering.explicit(42))
        .testEquals();
    reserializeAndAssert(c);
  }

  public void testExplicit_sortingExample() {
    Comparator<Integer> c = Ordering.explicit(2, 8, 6, 1, 7, 5, 3, 4, 0, 9);
    List<Integer> list = asList(0, 3, 5, 6, 7, 8, 9);

    new EqualsTester()
        .addEqualityGroup(c, Ordering.explicit(42, 5))
        .addEqualityGroup(Ordering.explicit(5, 42))
        .addEqualityGroup(Ordering.explicit(42))
        .testEquals();
    reserializeAndAssert(c);
  }

  public void testExplicit_sortingExample() {
    Comparator<Integer> c = Ordering.explicit(2, 8, 6, 1, 7, 5, 3, 4, 0, 9);
    List<Integer> list = asList(0, 3, 5, 6, 7, 8, 9);

   *       visible static factory method whose return type is {@code C} or {@code C}'s subtype.
   * </ul>
   *
   * <p>In all cases, if {@code C} needs custom logic for testing serialization, you can add an
   * explicit {@code testSerializable()} test in the corresponding {@code CTest} class, and {@code
   * C} will be excluded from automated serialization test performed by this method.
   */
  @Test

    // Collapse equal elements, which Ordering.explicit() doesn't support, while
    // maintaining the ordering by first occurrence.
    Set<String> elementsPlus = new LinkedHashSet<>();
    elementsPlus.add(BEFORE_FIRST);
    elementsPlus.add(BEFORE_FIRST_2);
    elementsPlus.addAll(asList(elements));
    elementsPlus.add(AFTER_LAST);
    elementsPlus.add(AFTER_LAST_2);
    return Ordering.explicit(new ArrayList<>(elementsPlus));
  }

 *   <li><strong>Parent Element Trimming</strong>:
 *     <ul>
 *       <li>Removes parent {@code <groupId>} when child has no explicit groupId</li>
 *       <li>Removes parent {@code <version>} when child has no explicit version</li>
 *       <li>Removes parent {@code <artifactId>} when it can be inferred from relativePath</li>
 *     </ul>
 *   </li>

        @DisplayName("should prioritize explicit model over --all option")
        void shouldPrioritizeExplicitModelOverAllOption() {
            UpgradeContext context =
                    createMockContext(tempDir, TestUtils.createOptions(true, null, null, null, "4.0.0"));
            String result = upgradeGoal.testDoUpgradeLogic(context, "4.0.0");

            assertEquals("4.0.0", result, "Explicit model should take precedence over --all");

   *       visible static factory method whose return type is {@code C} or {@code C}'s subtype.
   * </ul>
   *
   * <p>In all cases, if {@code C} needs custom logic for testing serialization, you can add an
   * explicit {@code testSerializable()} test in the corresponding {@code CTest} class, and {@code
   * C} will be excluded from automated serialization test performed by this method.
   */
  @Test

            // Remove parent groupId if child has no explicit groupId
            if (childGroupId == null) {
                Element parentGroupIdElement = parentElement.child(GROUP_ID).orElse(null);
                if (parentGroupIdElement != null) {
                    DomUtils.removeElement(parentGroupIdElement);
                    context.detail("Removed: parent groupId (child has no explicit groupId)");
                    hasChanges = true;