--- /dev/null
+<?php
+
+namespace Drupal\filter\Render;
+
+use Drupal\Component\Render\MarkupInterface;
+use Drupal\Component\Render\MarkupTrait;
+
+/**
+ * Defines an object that passes markup through the Filter system.
+ *
+ * This object should only be constructed with markup that is safe to render. If
+ * there is any risk that the string contains user-entered data that has not
+ * been filtered first, it must not be used.
+ *
+ * @internal
+ * This object is marked as internal because it should only be used in the
+ * Filter module on strings that have already been been filtered and sanitized
+ * in \Drupal\filter\Plugin\FilterInterface.
+ *
+ * @see \Drupal\Core\Render\Markup
+ */
+final class FilteredMarkup implements MarkupInterface, \Countable {
+ use MarkupTrait;
+
+}