@Override
    public String eventName() {
        return Constants.EVENT_NAME_DICT;
    }
Create a new {@code BatchDictChangedEvent}.operator is unknown.

@param source   Current dict state
@param before   Before the change dict state
@param type     event type
@param operator operator
shenyu-admin/src/main/java/org/apache/shenyu/admin/model/event/dict/BatchDictChangedEvent.java