CommonAttributesAndElements.InbandEventStream has an XML tag to be an attribute, but should be an element:

InbandEventStream *DescriptorType `xml:"inbandEventStream,attr"`

should be

InbandEventStream *DescriptorType `xml:"InbandEventStream,omitempty"`

otherwise it will never be unmarshaled.

I think is is valid to have multiple InbandEventStream elements, which would need more than just this fix.

InbandEventStream []DescriptorType `xml:"InbandEventStream,omitempty"`