Clarification on creating drafts from a published document in Sanity.io.

 import { merge } from 'lodash/fp' // not necessary just what I was using

const {
    docId,
    ...additionalProperties
  } = formData

const updateObject = {
    ...propertiesToUpdate
  }

const [published, draft] = await client.getDocuments([
    docId,
    `drafts.${docId}`,
  ])

  if (draft) {
    const res = await client.patch(docId).set(updateObject).commit()
  } else {
    const draftDoc = merge(
      { ...published, _id: `drafts.${docId}`, _type: 'card' },
      updateObject,
    )
    const res = await client.createIfNotExists(draftDoc)
  }