private static IntRange rangeFrom(ModelElement element, String name) {
        try {
            return IntRange.from(element.stringAttribute(name, ""));
        }
        catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("Illegal " + name + " value", e);
        }
    }
The cloud account to use for nodes in this spec, if any
config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/NodesSpecification.java