src/JsonApiResource/LinkCollection.php       |  1 +
 src/Normalizer/ContentEntityDenormalizer.php | 14 +-------------
 2 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/src/JsonApiResource/LinkCollection.php b/src/JsonApiResource/LinkCollection.php
index bc5fb24..3e0429c 100644
--- a/src/JsonApiResource/LinkCollection.php
+++ b/src/JsonApiResource/LinkCollection.php
@@ -114,6 +114,7 @@ final class LinkCollection implements \IteratorAggregate {
    *   A new LinkCollection with the given context.
    */
   public function withContext($context) {
+    assert(Inspector::assertAllObjects([$context], JsonApiDocumentTopLevel::class, ResourceObject::class));
     return new static($this->links, $context);
   }
 
diff --git a/src/Normalizer/ContentEntityDenormalizer.php b/src/Normalizer/ContentEntityDenormalizer.php
index 5c5157a..7d6c28d 100644
--- a/src/Normalizer/ContentEntityDenormalizer.php
+++ b/src/Normalizer/ContentEntityDenormalizer.php
@@ -19,19 +19,7 @@ final class ContentEntityDenormalizer extends EntityDenormalizerBase {
   protected $supportedInterfaceOrClass = ContentEntityInterface::class;
 
   /**
-   * Prepares the input data to create the entity.
-   *
-   * @param array $data
-   *   The input data to modify.
-   * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
-   *   Contains the info about the resource type.
-   * @param string $format
-   *   Format the given data was extracted from.
-   * @param array $context
-   *   Options available to the denormalizer.
-   *
-   * @return array
-   *   The modified input data.
+   * {@inheritdoc}
    */
   protected function prepareInput(array $data, ResourceType $resource_type, $format, array $context) {
     $data_internal = [];