code: function(id, onSuccessCallback) {
              var additionalMandatedParams = {
                  key: this.getKey(id),
                  bucket: this.getBucket(id)
              };
  
              return qq.FineUploaderBasic.prototype._onSubmitDelete.call(this, id, onSuccessCallback, additionalMandatedParams);
          }
docs: Hooks into the base internal `_onSubmitDelete` to add key and bucket params to the delete file request.