etcd3 API - v2.0.0
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    Interface IDeleteRangeResponse

    interface IDeleteRangeResponse {
        deleted: string;
        header: IResponseHeader;
        prev_kvs: IKeyValue[];
    }
    Index
    deleted: string

    deleted is the number of keys deleted by the delete range request.

    prev_kvs: IKeyValue[]

    if prev_kv is set in the request, the previous key-value pairs will be returned.