expression {
  comprehension_expr {
    iter_range {
      ident_expr {
        name: "request"
      }
    }
    result {
      id: 3530822107858468864
    }
  }
}
trailers {
  headers {
    key: "\r\000"
  }
}
stream_info {
  dynamic_metadata {
    filter_metadata {
      key: ""
      value {
      }
    }
  }
  requested_server_name: "/"
}
