BaseAccessController::loadItem

protected function loadItem(int $itemId = null): ?AccessibleItem;

abstract protected function loadUser(int $userId): AccessibleUser;

/**
 * @deprecated use ::$ruleFactory property
 */
protected function getRuleName(string $action): ?string
{
	$action = explode('_', $action);
	$action = array_map(function($el) {
		return ucfirst(strtolower($el));
	}, $action);
	return $this->getRuleNamespace() . implode($action) . static::RULE_SUFFIX;
}