diff --git a/src/Plugin/views/display/RestExportNested.php b/src/Plugin/views/display/RestExportNested.php
index a852577..03f52b1 100644
--- a/src/Plugin/views/display/RestExportNested.php
+++ b/src/Plugin/views/display/RestExportNested.php
@@ -33,22 +33,18 @@ class RestExportNested extends RestExport {
       return $this->view->style_plugin->render();
     });
 
-    $class = $this->renderer->executeInRenderContext(new RenderContext(), function () {
-      return get_class($this->view->style_plugin);
-    });
-
     // Decode results.
     $results = \GuzzleHttp\json_decode($build['#markup']);
 
-    switch ($class) {
-      case 'Drupal\pager_serializer\Plugin\views\style\PagerSerializer':
-        $rows = \Drupal::config('pager_serializer.settings')->get('rows_label');
-        $results->$rows = $this->flatten($results->$rows);
-        break;
-      case 'Drupal\rest\Plugin\views\style\Serializer':
-      default:
-        $results = $this->flatten($results);
-        break;
+    // The Core Serializer returns an array of rows. Custom can create an object
+    // with a 'rows' parameter.
+    if (gettype($results) === 'object') {
+      // @todo Allow rows name property to be customizable.
+      $rows = 'rows';
+      $results->$rows = $this->flatten($results->$rows);
+    }
+    else {
+      $results = $this->flatten($results);
     }
 
     // Convert back to JSON.
@@ -93,11 +89,12 @@ class RestExportNested extends RestExport {
    *   Flattened view data.
    */
   protected function flatten(array $data) {
+    // Loop through rows results and fields.
     foreach ($data as $key => $result) {
       foreach ($result as $property => $value) {
         // Check if the field can be decoded using PHP's json_decode().
         if (is_string($value)) {
-          if (json_decode($value) !== $value) {
+          if (json_decode($value) !== NULL) {
             // If so, use Guzzle to decode the JSON and add it to the data.
             $data[$key]->$property = \GuzzleHttp\json_decode($value);
           }