docs: function StoreValue(options, callback) {
      CommandBase.call(this, 'RpbPutReq', 'RpbPutResp', callback);
      this.validateOptions(options, schema);
      var hasBucket = this.options.bucket ||
          (RiakObject.isRiakObject(options.value) && this.options.value.bucket);
      if (!hasBucket) {
          throw new Error('Must supply bucket directly or via a RiakObject');
      }
  }