code: @Nullable
    public static EmailAddress getAsEmailAddress (@Nullable final InternetAddress aInternetAddress)
    {
      return aInternetAddress == null ? null : new EmailAddress (aInternetAddress.getAddress (),
                                                                 aInternetAddress.getPersonal ());
    }
docs: Convert the passed {@link InternetAddress} to an {@link EmailAddress}
  
  @param aInternetAddress
  Source object. May be <code>null</code>.
  @return <code>null</code> if the source object is <code>null</code>.