id; } public function getMangaId(): string { return $this->mangaId; } public function getTitle(): string { return $this->title; } public function getNumber(): float { return $this->number; } public function getTotalPages(): int { return $this->totalPages; } public function getPreviousChapterId(): ?string { return $this->previousChapterId; } public function getNextChapterId(): ?string { return $this->nextChapterId; } public function getNavigation(): array { $navigation['previousChapter'] = $this->previousChapterId; $navigation['nextChapter'] = $this->nextChapterId; return $navigation; } }