public SummaryField getSummaryField(String name) {
        var field = get(name);
        if (field != null) return field;
        if (inherited().isEmpty()) return null;
        for (var inheritedSummary : inherited()) {
            var inheritedField = inheritedSummary.getSummaryField(name);
            if (inheritedField != null)
                return inheritedField;
        }
        return null;
    }
Returns whether the user has noted explicitly that this summary accesses disk
config-model/src/main/java/com/yahoo/vespa/documentmodel/DocumentSummary.java