Michael Vanetta
--- a/schemaapp.api.php 0 → 100644
+++ b/schemaapp.api.php 0 → 100644
+
+/**
+ * Determine if the schema should be added to the page.
+ *
+ * @param array $page
+ *   The page array as provided in hook_page_attachments_alter().
+ *
+ * @return int|null
+ *   Return -1 to NOT add the schema to the page.
+ *   Return NULL will add the schema to the page.
+ */
+function hook_schemaapp_schema_visibility(array $page): ?int {
+  if (!empty($page['my_special_region']) ||
+      \Drupal::routeMatch()->getRouteName() == 'my_custom_route') {
+    return -1;
+  }