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## The GRAS TODO list
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* handle forecast
* handle items multiple
** inform upstream of multiple requirements inposed on input buffs
* handle calculating noutputitems using ninputs as a constraint
* handle history
** test implementation
* allocation
** hooks for advanced allocation
** intelligent sizing of buffers
** communicate upstream requirements?
** communicate downstream requirements?
* python wrappers for hier_block and top_block
* python wrapper for block will come from grextras
* python wrapper should set weak_self somehow
* bring in numanuma
** thread prio
** thread affinity
** memory affinity
* track memcpys for block usage stats