SFTP task result type default constructors missing

The SFTP tasks return results of classes such as Frends.SFTP.DownloadFiles.Definitions.Result. These classes seem not to have default constructors. They only have internal consturctors that take parameters of internal types (such as FileTransferResult). This seems to make it impossible to catch an exception and handle it and then return a result of the task's result type from the error handler.