How to implement a nodes type with IDs args in absinthe?

I have checked the documents and the absinthe book, but not found example.

Just like GitHub’s api, if I input this query:

query {
  nodes(ids:["MDU6SXNzdWUxMzkzNTM2OTg=", "MDU6SXNzdWUxMzkyMDkwOTc="]) {
    ... on Issue {
      id
      body
    }
  }
}

It returns two issues of absinthe’s issue:

{
  "data": {
    "nodes": [
      {
        "id": "MDU6SXNzdWUxMzkzNTM2OTg=",
        "body": "Similar to `Node.from_global_id`, support a mechanism to parse out internal IDs from cursor values. While the cursors are opaque to the client, IDs may be needed to support accessing data from backends.\n"
      },
      {
        "id": "MDU6SXNzdWUxMzkyMDkwOTc=",
        "body": "As is explained here: https://github.com/graphql/graphql-relay-js/commit/238d724a6c14bbda2aff180f839f27e1961930d7\n\nFor the initial release we only support the equivalent of `connectionFromArray` -- we need to support a lazy data structure that will allow us to work with databases _without_ loading all the data and simply discarding the parts we don't want. I think we can do this in Elixir more gracefully than the `connectionFromArraySlice` approach.\n"
      }
    ]
  }
}