public ParsedStruct ensureStruct() {
        if (wrappedStruct == null) {
            wrappedStruct = new ParsedStruct("annotation." + name());
            wrappedStruct.tagOwner(ownedBy);
        }
        return wrappedStruct;
    }
This class holds the extracted information after parsing a
"annotation" block, using simple data structures as far as
possible.  Do not put advanced logic here!
@author arnej27959
config-model/src/main/java/com/yahoo/schema/parser/ParsedAnnotation.java