/** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $display */
$display = $form_display_storage->load('node.ief_test_complex.default');
$component = $display->getComponent('multi');
/** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $display */
$display = $form_display_storage->load('node.ief_test_complex.default');
$component = $display->getComponent('multi');