toXML method
Implementation
@override
String toXML() {
return '''
<?xml version="1.0" encoding="utf-8"?>
<cupps xmlns="$xmlns" messageID="$messageID" xmlns:xsi="$xsi" messageName="$messageName">
<$messageName result="$result" >
${status.map((e) => e.toXML()).join()}
</$messageName >
</cupps>
'''
.replaceAll("\n", "")
.replaceAll("\t", "")
.replaceAll(" ", "");
}