patchtree-1.js

// KeyChain:: Array<mixed>
// Before:: mixed
// After:: Mixed
// Replacements:: Map<Before, After>
// patchTree:: (Map<KeyChain, Replacements>) => Object => Object

patchtree-2.js

export default patchTree(
  new Map([
    [
      ["id"], 
      ["me", current_account.id],
    ],
    [
      ["data", "id"],
      new Map([
        ["me", current_account.id],
      ]),
    ],
    [
      ["data", "relationships", "billing-information", "data", "id"],
      new Map([
        ["latest", current_account.billing_informations.last.id],
        ["current", current_cart.billing_information.id],
      ]),
    ],
  ])
)

patchtree-3.js

import shortcutReplacement from "patchtree-2"

shortcutReplacement({
  id: "me",
  data: {
    attributes: {
      name: "Kurtis Rainbolt-Greene"
    },
    relationships: {
      "billing-informations": {
        data: {
          id: "current"
        }
      }
    }
  }
})

patchtree-4.js

{
  id: "1",
  data: {
    attributes: {
      name: "Kurtis Rainbolt-Greene"
    },
    relationships: {
      "billing-informations": {
        data: {
          id: "2"
        }
      }
    }
  }
}