*/ public function getAll( string $name ): array; /** * @param string $name * @return bool */ public function has( string $name ): bool; /** * @param string $name * @param string $value * @return void */ public function set( string $name, string $value ): void; /** * @return void */ public function sort(): void; /** * @return \Iterator Pair iterator: string => string */ public function getIterator(); /** * @return string */ public function toString(): string; }