* www.google.com} is {@code google.com}.
   *
   * @throws IllegalStateException if the domain has no parent, as determined by {@link #hasParent}
   */
  public InternetDomainName parent() {
    checkState(hasParent(), "Domain '%s' has no parent", name);
    return ancestor(1);
  }

  /**
   * Returns the ancestor of the current domain at the given number of levels "higher" (rightward)

   * www.google.com} is {@code google.com}.
   *
   * @throws IllegalStateException if the domain has no parent, as determined by {@link #hasParent}
   */
  public InternetDomainName parent() {
    checkState(hasParent(), "Domain '%s' has no parent", name);
    return ancestor(1);
  }

  /**
   * Returns the ancestor of the current domain at the given number of levels "higher" (rightward)

PomReader { private java.util.HashMap properties; private final org.w3c.dom.Element projectElement; private final org.w3c.dom.Element parentElement; public void PomReader(java.net.URL, org.apache.ivy.plugins.repository.Resource); public final boolean hasParent(); public final void setProperty(String, String); public final String getGroupId(); public final String getParentGroupId(); public final String getArtifactId(); public final String getParentArtifactId(); public final String getVersion(); public final...