Overrides EntityTranslationController::entityFormTitle().
Overrides EntityTranslationController::entityFormTitle
protected function entityFormTitle(EntityInterface $entity) {
$block_type = entity_load('custom_block_type', $entity->type->value);
return t('<em>Edit @type</em> @title', array(
'@type' => $block_type
->label(),
'@title' => $entity
->label(),
));
}