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diff --git a/web/core/modules/settings_tray/src/Access/BlockPluginHasSettingsTrayFormAccessCheck.php b/web/core/modules/settings_tray/src/Access/BlockPluginHasSettingsTrayFormAccessCheck.php
new file mode 100644
index 000000000..01a99a079
--- /dev/null
+++ b/web/core/modules/settings_tray/src/Access/BlockPluginHasSettingsTrayFormAccessCheck.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Drupal\settings_tray\Access;
+
+use Drupal\block\BlockInterface;
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Block\BlockPluginInterface;
+use Drupal\Core\Plugin\PluginWithFormsInterface;
+use Drupal\Core\Routing\Access\AccessInterface;
+
+/**
+ * Determines whether the requested block has a 'settings_tray' form.
+ *
+ * @internal
+ */
+class BlockPluginHasSettingsTrayFormAccessCheck implements AccessInterface {
+
+  /**
+   * Checks access for accessing a block's 'settings_tray' form.
+   *
+   * @param \Drupal\block\BlockInterface $block
+   *   The block whose 'settings_tray' form is being accessed.
+   *
+   * @return \Drupal\Core\Access\AccessResultInterface
+   *   The access result.
+   */
+  public function access(BlockInterface $block) {
+    /** @var \Drupal\Core\Block\BlockPluginInterface $block_plugin */
+    $block_plugin = $block->getPlugin();
+    return $this->accessBlockPlugin($block_plugin);
+  }
+
+  /**
+   * Checks access for accessing a block plugin's 'settings_tray' form.
+   *
+   * @param \Drupal\Core\Block\BlockPluginInterface $block_plugin
+   *   The block plugin whose 'settings_tray' form is being accessed.
+   *
+   * @return \Drupal\Core\Access\AccessResultInterface
+   *   The access result.
+   *
+   * @see settings_tray_preprocess_block()
+   */
+  public function accessBlockPlugin(BlockPluginInterface $block_plugin) {
+    return AccessResult::allowedIf($block_plugin instanceof PluginWithFormsInterface && $block_plugin->hasFormClass('settings_tray'));
+  }
+
+}