Self sign-up has been disabled due to increased spam activity. If you want to get access, please send an email to a project owner (preferred) or at gitlab(at)nic(dot)cz. We apologize for the inconvenience.
this caters a use case when a layer needs to issue subrequests before
continuing, so it yields. when the subrequests finish, the layer is
resumed with the same parameters and input
todo: fix validator, that shifted most of the processing to driver
