如何在Munit set Event processor中访问包括头部、queryparams在内的属性。我使用的是Anypoint Studio 7.5

<munit:test name="testFlowTest" description="Test">
    <munit:set-event doc:name="Set Event" doc:id="c8e7e6e7-7e6e-7e6e-7e6e-7e6e7e6e7e6e" >
        <munit:payload><![CDATA[]]></munit:payload>
        <munit:attributes>
            <munit:attribute key="Content-Type" value="application/json" />
        </munit:attributes>
        <munit:variables>
            <munit:variable key="queryParam" value="#[message.inboundProperties.'http.query.params'.paramName]" />
        </munit:variables>
    </munit:set-event>
    <flow-ref doc:name="Flow-ref to be tested" doc:id="c8e7e6e7-7e6e-7e6e-7e6e-7e6e7e6e7e6e" name="flowToBeTested" />
    <munit:assertions>
        <munit:assert-payload-equals doc:name="Assert Payload Equals" doc:id="c8e7e6e7-7e6e-7e6e-7e6e-7e6e7e6e7e6e" />
    </munit:assertions>
</munit:test>