// XML before loading request
xml.getBytesLoaded(): undefined
xml.getBytesTotal(): undefined
xml._bytesLoaded: undefined
xml._bytesTotal: undefined

// XML loading requested
xml.getBytesLoaded(): 0
xml.getBytesTotal(): undefined
xml._bytesLoaded: 0
xml._bytesTotal: undefined

// XML received data: <test>Héllo Wörld!</test>
xml.getBytesLoaded(): 27
xml.getBytesTotal(): 27
xml._bytesLoaded: 27
xml._bytesTotal: 27
