public ParsedMatchSettings matchSettings() {
        if (matchInfo == null) matchInfo = new ParsedMatchSettings();
        return this.matchInfo;
    }
This class holds the extracted information after parsing a "fieldset"
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/ParsedFieldSet.java