public void setCreatedBy_GreaterThan(String createdBy, ConditionOptionCall<RangeQueryBuilder> opLambda) {
        final Object _value = createdBy;
        RangeQueryBuilder builder = regRangeQ("createdBy", ConditionKey.CK_GREATER_THAN, _value);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setCreatedBy_LessThan(String createdBy) {

    public void setCreatedBy_GreaterThan(String createdBy, ConditionOptionCall<RangeQueryBuilder> opLambda) {
        final Object _value = createdBy;
        RangeQueryBuilder builder = regRangeQ("createdBy", ConditionKey.CK_GREATER_THAN, _value);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setCreatedBy_LessThan(String createdBy) {

    public void setBoostExpr_GreaterThan(String boostExpr, ConditionOptionCall<RangeQueryBuilder> opLambda) {
        final Object _value = boostExpr;
        RangeQueryBuilder builder = regRangeQ("boostExpr", ConditionKey.CK_GREATER_THAN, _value);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setBoostExpr_LessThan(String boostExpr) {

        final Object _value = crawlingInfoId;
        RangeQueryBuilder builder = regRangeQ("crawlingInfoId", ConditionKey.CK_GREATER_THAN, _value);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setCrawlingInfoId_LessThan(String crawlingInfoId) {

			delete(c, subSys)
			return nil
		}
		return err
	}

	ck, ok := c[subSys][tgt]
	if !ok {
		return Error[ErrConfigNotFound]("sub-system %s:%s already deleted or does not exist", subSys, tgt)
	}

	if len(inputs) == 2 {
		currKVS := ck.Clone()
		defKVS := DefaultKVS[subSys]
		for _, delKey := range strings.Fields(inputs[1]) {
			_, ok := currKVS.Lookup(delKey)

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