*/ private array $mutationCollections = []; public function appendMutationCollection(MutationCollection $collection): void { $this->mutationCollections[] = $collection; } /** * @return list */ public function getMutationCollections(): array { return $this->mutationCollections; } public function setMutationsCollections(MutationCollection ...$collections): void { $this->mutationCollections = $collections; } public function hasMutationCollections(): bool { return $this->mutationCollections !== []; } }