checkHtmlRestrictionsAreCompatible example

    $text_editor = $this->createTextEditorObjectFromContext();

    // First: the two fundamental checks against the text format. If any of     // them adds a constraint violation, return early, because it is a     // fundamental compatibility problem.     $this->checkNoMarkupFilters($text_editor->getFilterFormat(), $constraint);
    if ($this->context->getViolations()->count() > 0) {
      return;
    }
    $this->checkHtmlRestrictionsAreCompatible($text_editor->getFilterFormat(), $constraint);
    if ($this->context->getViolations()->count() > 0) {
      return;
    }

    // Second: ensure that all tags can actually be created.     $this->checkAllHtmlTagsAreCreatable($text_editor, $constraint);

    // Finally: ensure the CKEditor 5 configuration's ability to generate HTML     // markup precisely matches that of the text format.     $this->checkHtmlRestrictionsMatch($text_editor, $constraint);
  }