Cannot set Name to Image

[高橋秀平]

I want to set name to Images when I upload them with MediaService#upload.
But name field in response is empty.
How to set name to Images?

request

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
  <soapenv:Header>
    <ns1:RequestHeader soapenv:mustUnderstand="0" 
xmlns:ns1="https://adwords.google.com/api/adwords/cm/v201710";>
      <ns1:clientCustomerId>xxx-xxx-xxxx</ns1:clientCustomerId>
      <ns1:developerToken>xxxxxxx</ns1:developerToken>
      <ns1:userAgent>xxxx</ns1:userAgent>
      <ns1:validateOnly>false</ns1:validateOnly>
      <ns1:partialFailure>true</ns1:partialFailure>
    </ns1:RequestHeader>
  </soapenv:Header>
  <soapenv:Body>
    <upload xmlns="https://adwords.google.com/api/adwords/cm/v201710";>
      <media xsi:type="ns2:Image" 
xmlns:ns2="https://adwords.google.com/api/adwords/cm/v201710";>
        <ns2:type>IMAGE</ns2:type>
        <ns2:name>myimage</ns2:name>
        <ns2:data>/9j/4AA...</ns2:data>
      </media>
    </upload>
  </soapenv:Body>
</soapenv:Envelope>


response

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/";>
  <soap:Header>
    <ResponseHeader 
xmlns="https://adwords.google.com/api/adwords/cm/v201710";>
      <requestId>xxxxxx</requestId>
      <serviceName>MediaService</serviceName>
      <methodName>upload</methodName>
      <operations>1</operations>
      <responseTime>225</responseTime>
    </ResponseHeader>
  </soap:Header>
  <soap:Body>
    <uploadResponse 
xmlns="https://adwords.google.com/api/adwords/cm/v201710";>
      <rval xsi:type="Image" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
        <mediaId>xxxxxx</mediaId>
        <type>IMAGE</type>
        <referenceId>-xxxxxx</referenceId>
        <dimensions>
          <key>FULL</key>
          <value>
            <width>640</width>
            <height>100</height>
          </value>
        </dimensions>
        <urls>
          <key>FULL</key>
          <value>https://tpc.googlesyndication.com/simgad/xxxxxx</value>
        </urls>
        <mimeType>IMAGE_JPEG</mimeType>
        <sourceUrl/>
        <name/>
        <fileSize>9442</fileSize>
        <Media.Type>Image</Media.Type>
      </rval>
    </uploadResponse>
  </soap:Body>
</soap:Envelope>

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