createStoryNodes2.js

const createStoryNodes = (data, type) =>
    data.map(storyId => {
      const id = `${type}-${storyId}`
      const storyNode = {
        id,
        parent: null,
        children: [],
        internal: { type },
        storyId: storyId,
        item: items.get(storyId),
      }

      storyNode.internal.contentDigest = buildContentDigest(storyNode)

      createNode(storyNode)
    })