{
  "name": "merge",
  "description": "Combine multiple message into one",
  "spec":{
    "id": "__HOPE__/builtin/flow/merge",
    "icon": "code-fork",
    "in": {
      "ports": [],
      "allow_to_add": true
    },
    "out": {
      "ports": [{
        "name": "out",
        "type": "object"
      }]
    }
  },
  "doc" : "builtin/flow.html#merge"
}