* When {@code --infer} option is enabled, applies inference optimizations to remove redundant information:
 *
 * <h4>Limited Inference for 4.0.0 Models (Maven 3.x POMs)</h4>
 * <ul>
 *   <li><strong>Child GroupId Removal</strong>: Removes child {@code <groupId>} when it matches parent groupId</li>
 *   <li><strong>Child Version Removal</strong>: Removes child {@code <version>} when it matches parent version</li>
 * </ul>
 *

        // First apply limited inference (child elements) - this removes matching child groupId/version
        hasChanges |= trimParentElementLimited(context, root, parentElement);

        // Only remove parent elements if the parent is in the same reactor (not external)
        if (isParentInReactor(parentElement, pomMap, context)) {
            // Remove parent groupId if child has no explicit groupId

      // values of these removes, but the cache should be empty after the removes, regardless.
      keys.remove(1);
      keys.remove(2);
      assertThat(keys.remove(null)).isFalse();
      assertThat(keys.remove(6)).isFalse();
      assertThat(keys.remove(-6)).isFalse();
      assertThat(keys.removeAll(asList(null, 0, 15, 1500))).isFalse();

      // values of these removes, but the cache should be empty after the removes, regardless.
      keys.remove(1);
      keys.remove(2);
      assertThat(keys.remove(null)).isFalse();
      assertThat(keys.remove(6)).isFalse();
      assertThat(keys.remove(-6)).isFalse();
      assertThat(keys.removeAll(asList(null, 0, 15, 1500))).isFalse();

 *   <li>Removes managed dependencies that are not used by direct dependencies</li>
 *   <li>Retains only managed dependencies that appear in the resolved dependency tree</li>
 * </ul>
 * <p>
 * <b>Repository and Profile Pruning</b>: The consumer POM removal strategy:
 * <ul>
 *   <li>Removes the central repository (only non-central repositories are kept)</li>

    }

    /**
     * Removes the specified element from this set if it is present.
     *
     * @param o
     *            object to be removed from this set, if present.
     * @return true if the set contained the specified element.
     */
    @Override
    public boolean remove(final Object o) {
        return map.remove(o) == PRESENT;
    }

    /**

    }

    /**
     * Removes the first element.
     *
     * @return the first element
     */
    public E removeFirst() {
        if (isEmpty()) {
            throw new NoSuchElementException();
        }
        final E first = header.next.element;
        header.next.remove();
        return first;
    }

    /**
     * Removes the last element.
     *

 * http://download.oracle.com/javase/1.5.0/docs/tooldocs/solaris/javadoc.html#documentationcomments for details.
 *
 * <ul>
 * <li>Removes leading '*' characters.</li>
 * <li>Removes block tags.</li>
 * <li>Removes leading and trailing empty lines.</li>
 * </ul>
 */
class JavadocScanner {
    private final StringBuilder input = new StringBuilder();
    private int pos;

    }

    /**
     * Removes whitespace from the left side of the string.
     *
     * @param text
     *            The text to trim
     * @return The resulting string
     */
    public static final String ltrim(final String text) {
        return ltrim(text, null);
    }

    /**
     * Removes the specified characters from the left side of the string.
     *

   */
  @CanIgnoreReturnValue
  public E removeFirst() {
    return remove();
  }

  /**
   * Retrieves, but does not remove, the least element of this queue, or returns {@code null} if the
   * queue is empty.
   */
  public @Nullable E peekFirst() {
    return peek();
  }

  /**
   * Removes and returns the greatest element of this queue, or returns {@code null} if the queue is
   * empty.
   */