https://api.drupal.org/api/drupal/core%21modules%21views%21src%21Plugin%21Derivative%21ViewsBlock.php/function/ViewsBlock%3A%3AgetDerivativeDefinition/8.9.x
function ViewsBlock::getDerivativeDefinition | Drupal API
functiondrupalapi
https://api.drupal.org/api/drupal/core%21modules%21views%21src%21Plugin%21Derivative%21ViewsExposedFilterBlock.php/function/ViewsExposedFilterBlock%3A%3AgetDerivativeDefinition/8.9.x
function ViewsExposedFilterBlock::getDerivativeDefinition | Drupal API
functiondrupalapi