* @see org.apache.maven.api.services.VersionParser#parseVersion(String)
     */
    @Nonnull
    Version parseVersion(@Nonnull String version);

    /**
     * Parses the specified version range specification, for example "[1.0,2.0)".
     * <p>
     * Shortcut for {@code getService(VersionParser.class).parseVersionRange(...)}.
     *
     * @param versionRange the version string to parse

        Map executionMap = compilerPlugin.getExecutionsAsMap();
        assertNull(
                executionMap.get("test"),
                "Plugin execution: 'test' should NOT exist in the compiler plugin specification for the child project!");
    }

 * equals</i>. That is, {@code a.compareTo(b)} or {@code comparator.compare(a, b)} should equal zero
 * <i>if and only if</i> {@code a.equals(b)}. If this advice is not followed, the resulting
 * collection will not correctly obey its specification.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @author Jared Levy
 * @author Louis Wasserman

 * equals</i>. That is, {@code a.compareTo(b)} or {@code comparator.compare(a, b)} should equal zero
 * <i>if and only if</i> {@code a.equals(b)}. If this advice is not followed, the resulting map will
 * not correctly obey its specification.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @author Jared Levy
 * @author Louis Wasserman

   * Collection<V>>} to {@code Map<K, List<V>>}.
   *
   * @since 15.0
   */
  @SuppressWarnings("unchecked")
  // safe by specification of ListMultimap.asMap()
  public static <K extends @Nullable Object, V extends @Nullable Object> Map<K, List<V>> asMap(
      ListMultimap<K, V> multimap) {
    return (Map<K, List<V>>) (Map<K, ?>) multimap.asMap();

 * equals</i>. That is, {@code a.compareTo(b)} or {@code comparator.compare(a, b)} should equal zero
 * <i>if and only if</i> {@code a.equals(b)}. If this advice is not followed, the resulting
 * collection will not correctly obey its specification.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @author Louis Wasserman
 * @since 12.0
 */

  /**
   * Returns a serializable ordering that uses the natural order of the values. The ordering throws
   * a {@link NullPointerException} when passed a null parameter.
   *
   * <p>The type specification is {@code <C extends Comparable>}, instead of the technically correct
   * {@code <C extends Comparable<? super C>>}, to support legacy types from before Java 5.
   *