default boolean isCompleted() {
        return isFailed() || isSucceed();
    }
This is the topper interface of async responseRef, if one operation want to provide async capability,
please provides a child interface which extends this super interface to use.
Notice: all detail classes should never directly implement this topper interface, since every operation will
provide a child interface for async operation.
dss-standard/dss-standard-common/src/main/java/com/webank/wedatasphere/dss/standard/common/entity/ref/AsyncResponseRef.java