Collection service

collectionService.getCollectionsByIDs(
  ids: string[],
  metafields?: string[]
): Promise<Collection[]>;

collectionService.getCollectionsByID(
  id: string,
  metafields?: string[]
): Promise<Collection[]>;

const collections = await collectionService.getCollectionsByIDs(
  ["gid://shopify/Collection/123"],
  ["custom.badge"]
);