From 6828366c5130d4e718cd1f376fc7292372135633 Mon Sep 17 00:00:00 2001
From: Joshua Graham <joshua.graham@au.ey.com>
Date: Wed, 3 Feb 2021 14:57:40 +1100
Subject: [PATCH] Allow themes to implement
 hook_field_widget_multivalue_form_alter().

---
 govcms.profile | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/govcms.profile b/govcms.profile
index 4c60c13c0..586552174 100644
--- a/govcms.profile
+++ b/govcms.profile
@@ -71,3 +71,17 @@ function govcms_field_widget_form_alter(&$element, FormStateInterface $form_stat
   // $context['widget']->getPluginId().
   \Drupal::theme()->alter(['field_widget_form'], $element, $form_state, $context);
 }
+
+/**
+ * Implements hook_field_widget_multivalue_form_alter().
+ */
+function govcms_field_widget_multivalue_form_alter(&$elements, FormStateInterface $form_state, $context) {
+  // In Drupal 7 `hook_field_widget_multivalue_form_alter` could be implemented
+  // by the theme, but in Drupal 8 this hook changed to being module-only.
+  // This hook can be critical for improving the editor experience for things
+  // like paragraphs. Implementing themes can access the plugin ID via
+  // $context['widget']->getPluginId().
+  \Drupal::theme()->alter([
+    'field_widget_multivalue_form',
+  ], $elements, $form_state, $context);
+}