https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Render%21Element%21RenderElementBase.php/function/RenderElementBase%3A%3AsetAttributes/11.x
function RenderElementBase::setAttributes | Drupal API
functiondrupalapi
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Render%21Element%21RenderElementBase.php/class/RenderElementBase/11.x
class RenderElementBase | Drupal API
classdrupalapi