*/ public function getIterator(): \Iterator { return new \ArrayIterator($this->sheets); } public function addSheet(SheetDefinition $sheet): void { $this->sheets[] = $sheet; } public function getTypeName(): string|int { return $this->typeName; } public function setTypeName(string|int $typeName): void { $this->typeName = $typeName; } public function hasDefaultSheet(): bool { return count($this->sheets) === 1; } public function getContentBlockName(): string { return $this->contentBlockName; } public function setContentBlockName(string $contentBlockName): void { $this->contentBlockName = $contentBlockName; } }