/**
  * Export this function definition to the given parent DOMElement.
  *
  * @param \DOMElement       $parent   Element to augment.
  * @param FunctionReflector $function Element to export.
  * @param \DOMElement       $child    if supplied this element will be
  *     augmented instead of freshly added.
  *
  * @return void
  */
 public function export(\DOMElement $parent, $function, \DOMElement $child = null)
 {
     if (!$child) {
         $child = new \DOMElement('function');
         $parent->appendChild($child);
     }
     $child->setAttribute('namespace', $function->getNamespace() ? $function->getNamespace() : $parent->getAttribute('namespace'));
     $child->setAttribute('line', $function->getLineNumber());
     $short_name = method_exists($function, 'getShortName') ? $function->getShortName() : $function->getName();
     $child->appendChild(new \DOMElement('name', $short_name));
     $child->appendChild(new \DOMElement('full_name', $function->getName()));
     $object = new DocBlockExporter();
     $function->setDefaultPackageName($parent->getAttribute('package'));
     $object->export($child, $function);
     foreach ($function->getArguments() as $argument) {
         $object = new ArgumentExporter();
         $object->export($child, $argument);
     }
 }