public function getEntitySubNamespace(
        string $entityFqn
    ): string {
        return $this->tidy(
            \substr(
                $entityFqn,
                \strrpos(
                    $entityFqn,
                    '\\' . AbstractGenerator::ENTITIES_FOLDER_NAME . '\\'
                )
                + \strlen('\\' . AbstractGenerator::ENTITIES_FOLDER_NAME . '\\')
            )
        );
    }