code: protected LinkedList<ModificationRecord> getModificationRecords(ClassDoc classDoc) {
  		ClassDoc superClass = classDoc.superclass();
  		if (superClass == null) {
  			return new LinkedList<ModificationRecord>();
  		}
  		LinkedList<ModificationRecord> result = this.getModificationRecords(superClass);
  		result.addAll(this.parseModificationRecords(classDoc.tags()));
  		return result;
  	}
docs: /*
  get the modification records of the class.