code: protected ModificationHistory getModificationHistory(Type type) {
  		ModificationHistory history = new ModificationHistory();
  		ClassDoc classDoc = this.wrDoc.getConfiguration().root.classNamed(type.qualifiedTypeName());
  		if (classDoc != null) {
  			LinkedList<ModificationRecord> list = this.getModificationRecords(classDoc);
  			history.addModificationRecords(list);
  		}
  		return history;
  	}
docs: /*
  get the modification history of the class.