@type t() :: %ProcessHub.Handler.ChildrenAdd.SyncHandle{
  hub_id: ProcessHub.hub_id(),
  post_start_results: [
    %ProcessHub.Handler.ChildrenAdd.PostStartData{
      child_nodes: term(),
      child_spec: term(),
      cid: term(),
      for_node: term(),
      has_errors: term(),
      nodes: term(),
      pid: term(),
      result: term()
    }
  ],
  start_opts: keyword()
}