Issue #3498301: Added null types.

Closes #3498301

src/Form/ManageComponentAttributesForm.php

@@ -95,17 +95,22 @@ class ManageComponentAttributesForm extends FormBase {
    *   An associative array containing the structure of the form.
    * @param \Drupal\Core\Form\FormStateInterface $form_state
    *   The current state of the form.
-   * @param \Drupal\layout_builder\SectionStorageInterface $section_storage
+ * @param \Drupal\layout_builder\SectionStorageInterface|null $section_storage
    *   The section storage being configured.
-   * @param int $delta
+   * @param ?int $delta
    *   The original delta of the section.
-   * @param string $uuid
+   * @param ?string $uuid
    *   The UUID of the block being updated.
    *
    * @return array
    *   The form array.
    */
-  public function buildForm(array $form, FormStateInterface $form_state, SectionStorageInterface $section_storage = NULL, $delta = NULL, $uuid = NULL) {
+  public function buildForm(
+    array $form,
+    FormStateInterface $form_state,
+    ?SectionStorageInterface $section_storage = NULL,
+    ?int $delta = NULL,
+    ?string $uuid = NULL) {
     $parameters = array_slice(func_get_args(), 2);
     foreach ($parameters as $parameter) {
       if (is_null($parameter)) {
@@ -398,5 +403,4 @@ class ManageComponentAttributesForm extends FormBase {
     }
     return (int) $this->delta;
   }
-
 }