private void traverse(final Module module, final Integer depth, final StringBuilder sb) {
final String indent = Strings.repeat(INDENTATION, depth);
sb.append(indent)
.append("<m name=\"")
.append(module.getTitle())
.append("\" ")
.append(formatMandatory(module))
.append(" pordnr=\"")
.append(module.getPordnr())
.append("\" ")
.append(formatCreditPoints(module))
.append(" />\n");
}
