src/Resource/JsonApiDocumentTopLevel.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Resource/JsonApiDocumentTopLevel.php b/src/Resource/JsonApiDocumentTopLevel.php
index 40ab87c..9aad1a5 100644
--- a/src/Resource/JsonApiDocumentTopLevel.php
+++ b/src/Resource/JsonApiDocumentTopLevel.php
@@ -8,6 +8,9 @@ namespace Drupal\jsonapi\Resource;
  * @see http://jsonapi.org/format/#document-top-level
  *
  * @internal
+ *
+ * @todo Add the missing required members: 'error' and 'meta' or document why not.
+ * @todo Add support for the missing optional members: 'jsonapi', 'links' and 'included' or document why not.
  */
 class JsonApiDocumentTopLevel {
 
@@ -19,7 +22,7 @@ class JsonApiDocumentTopLevel {
   protected $data;
 
   /**
-   * Instantiates a DocumentRootNormalizerValue object.
+   * Instantiates a JsonApiDocumentTopLevel object.
    *
    * @param \Drupal\Core\Entity\EntityInterface|\Drupal\jsonapi\EntityCollectionInterface $data
    *   The data to normalize. It can be either a straight up entity or a