<env:Envelope xmlns:env="http://www.w3.org/2003/05/soap-envelope" xmlns:xml="http://www.w3.org/XML/1998/namespace">
    <env:Header>
        <test2:echoOk2 xmlns:test2="http://example2.org/ts-tests"
            env:role="http://www.w3.org/2003/05/soap-envelope/role/ultimateReceiver"
            env:mustUnderstand="someOtherValue"
            env:anyAttribute="any value">
            foo
        </test2:echoOk2>
    </env:Header>
    <env:Body>

    </env:Body>
</env:Envelope>