Golang中数组的XML解组属性不同

I have a web service where I expect to receive two different requests; one is called Request containing just one Request and the other is called RequestBulk which contains an array of Requests. Both mapped to Golang structs as follows:

type RequestBulk struct {
    XMLName  xml.Name  `xml:"https://item.com RequestBulk"`
    Message  string    `xml:"Message"`
    Request  []Request `xml:"Request,omitempty"`
}

type Request struct {
    XMLName xml.Name `xml:"https://item.com Request"`
    Text    string   `xml:"text"`
}

Unmarshalling the following XMLs works as expected:

<Request xmlns="https://item.com">
  <text>Some request text</text>
</Request>

<RequestBulk xmlns="https://item.com">
  <Message>Some Text</Message>
  <Request xmlns="https://item.com">
    <text>Some request text</text>
  </Request>
  <Request xmlns="https://item.com">
    <text>Some other request text</text>
  </Request>
</RequestBulk>

The Problem

In RequestBulk, if I change

Request []Request `xml:"Request,omitempty"`

to

RequestMessage []Request `xml:"RequestMessage,omitempty"`

and change the XML to:

<RequestBulk xmlns="https://item.com">
  <Message>Some Text</Message>
  <RequestMessage xmlns="https://item.com">
    <text>Some request text</text>
  </RequestMessage>
  <RequestMessage xmlns="https://item.com">
    <text>Some other request text</text>
  </RequestMessage>
</RequestBulk>

I get the following error:

expected element type <Request> but have <RequestMessage>

Obviously because of the XMLName xml.Name `xml:"https://item.com Request"`

The Question

How do I keep the Request struct unchanged and still accept messages of type RequestBulk with a different name for the struct Request, namely, RequestMessage?

In other words; How do I use the same struct with different namespaces?

Run it on Go Playground.

You can implement the Unmarshaler interface to overwrite the element's local name before passing the element on to the decoder for the actual unmarshaling.

func (r *Request) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
    if start.Name.Local == "RequestMessage" {
        start.Name.Local = "Request" // overwrite
    }
    type tmp Request // avoid infinite recursive calls to Request.UnmarshalXML
    return d.DecodeElement((*tmp)(r), &start) // unmarshal
}

https://play.golang.org/p/0a_gpgkywwf