* replace "Strong" with "Soft" or "Weak" within the pasted text. The primary difference is that
   * strong entries store the key reference directly while soft and weak entries delegate to their
   * respective superclasses.
   */

  /** Used for strongly-referenced keys. */
  static class StrongEntry<K, V> extends AbstractReferenceEntry<K, V> {
    final K key;

      <key>package</key>
      <value>org.apache.maven.model</value>
    </default>
  </defaults>
  <classes>
    <class rootElement="true" xml.tagName="project">
      <name>Model</name>
      <superClass>ModelBase</superClass>
      <description>
        The {@code &lt;project>} element is the root of the descriptor.
        The following table lists all of the possible child elements.
      </description>