/**
  * Receives the value of the ODFDOM attribute representation <code>NumberCountryAttribute</code> ,
  * See {@odf.attribute number:country}
  *
  * @return - the <code>String</code> , the value or <code>null</code>, if the attribute is not set
  *     and no default value defined.
  */
 public String getNumberCountryAttribute() {
   NumberCountryAttribute attr =
       (NumberCountryAttribute) getOdfAttribute(OdfDocumentNamespace.NUMBER, "country");
   if (attr != null) {
     return String.valueOf(attr.getValue());
   }
   return null;
 }