  {
    "description": "This is a demo project.",
    "create_empty_commit": "true",
    "submit_type": "FAST_FORWARD_ONLY"
  }

  {
    "description": "This is a demo project.",
    "create_empty_commit": "true",
    "submit_type": "REBASE_IF_NECESSARY"
  }

Change demo project's submit type.
Change demo project's submit type.
