private String getPathWithSeparator(String separator) {
        if (parent != null) {
            final String prefix = parent.getPathWithSeparator(separator);
            return prefix.isEmpty() ? name : prefix + separator + name;
        } else {
            return "";
        }
    }
Represent a group in the tree structure of groups in hierarchical setup of VDS nodes.
vdslib/src/main/java/com/yahoo/vdslib/distribution/Group.java