function multipartUploadCopy(_x6, _x7) {
    return _multipartUploadCopy.apply(this, arguments);
  }
@param {String} name copy object name
@param {Object} sourceData
       {String} sourceData.sourceKey  the source object name
       {String} sourceData.sourceBucketName  the source bucket name
       {Number} sourceData.startOffset  data copy start byte offset, e.g: 0
       {Number} sourceData.endOffset  data copy end byte offset, e.g: 102400
@param {Object} options
       {Number} options.partSize