/**
  * Short description of method getDataProvider
  *
  * @access public
  * @author Joel Bout, <*****@*****.**>
  * @return tao_models_classes_table_DataProvider
  */
 public function getDataProvider()
 {
     $returnValue = null;
     $returnValue = taoResults_models_classes_table_VariableDataProvider::singleton();
     return $returnValue;
 }
 /**
  * Short description of method singleton
  *
  * @access public
  * @author Joel Bout, <*****@*****.**>
  * @return taoResults_models_classes_table_VariableDataProvider
  */
 public static function singleton()
 {
     $returnValue = null;
     if (is_null(self::$singleton)) {
         self::$singleton = new self();
     }
     return self::$singleton;
     return $returnValue;
 }