29         private readonly 
string $default_language_code,
    33         foreach ($translations as $translation) {
    34             $this->
add($translation);
    40         return $this->item->getId();
    43     public function get(): array
    53     public function remove(
string $language_code): 
void    55         unset($this->translations[$language_code]);
    60         return $this->translations[$language_code] ?? null;
    65         return $this->translations[$this->default_language_code] ?? null;
    70         return array_keys($this->translations);