protected function getTargetFieldCondition($field, $state)
 {
     FormBootstrapper::requirements();
     if ($field instanceof FormField) {
         $prefix = strpos($state, '[') === 0 ? '' : ':';
         if ($field->Form) {
             $condition = '#' . $field->ID() . $prefix . $state;
         } else {
             $condition = "[name='" . $field->ID() . "']" . $prefix . $state;
         }
     } else {
         $condition = $field . ':' . $state;
     }
     return $condition;
 }