/**
  * Visits a file node.
  *
  * @param PHP_Depend_Code_File $file The current file node.
  *
  * @return void
  * @see PHP_Depend_VisitorI::visitFile()
  */
 public function visitFile(PHP_Depend_Code_File $file)
 {
     $this->visits[] = get_class($file);
     parent::visitFile($file);
 }