function _mapTableNameToClass($table_name)
  {
    //this probably should be moved to toolkit...
    return toStudlyCaps($table_name);

  }
 function _checkImageObjectVariations($image, $check_array)
 {
     foreach ($check_array as $variation_name => $data) {
         $variation = $image->getVariation($variation_name);
         foreach ($data as $field => $value) {
             $get_method = toStudlyCaps('get' . $field, false);
             $this->assertEqual($variation->{$get_method}(), $value);
         }
     }
 }