List<ParsedDocument> getAllResolvedParents() {
        List<ParsedDocument> all = new ArrayList<>();
        all.addAll(getResolvedInherits());
        all.addAll(getResolvedReferences());
        return all;
    }
This class holds the extracted information after parsing a
"document" block in a schema (.sd) file, 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/ParsedDocument.java