ButtonSubType FLOW does not exists on enum

[Ihury]

This request works on WhatsApp Business API, but I don't have the FLOW subtype on wrapper.

{
  "messaging_product": "whatsapp",
  "recipient_type": "individual",
  "to": "...",
  "type": "template",
  "template": {
    "name": "...",
    "language": {
      "code": "pt_BR"
    },
    "components": [
      {
        "type": "body",
        "parameters": [
          {
            "type": "text",
            "text": "..."
          },
          {
            "type": "text",
            "text": "..."
          },
          {
            "type": "text",
            "text": "..."
          },
          {
            "type": "text",
            "text": "..."
          }
        ]
      },
      {
        "type": "button",
        "sub_type": "flow",
        "index": "0"
      }
    ]
  }
}

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