--- /dev/null
+/**
+ * Implements hook_block_build_BASE_BLOCK_ID_alter().
+ */
+function {{ machine_name }}_block_build_BASE_BLOCK_ID_alter(array &$build, \Drupal\Core\Block\BlockPluginInterface $block) {
+ // Explicitly enable placeholdering of the specific block.
+ $build['#create_placeholder'] = TRUE;
+}