Count how many elements of this scenario do not have is_fitted already set. This count may include $self.
@return int - number of unfitted elements in same scenario
AMD OSRC Tapper Team <firstname.lastname@example.org>
COPYRIGHT AND LICENSE
This software is Copyright (c) 2013 by Advanced Micro Devices, Inc..
This is free software, licensed under:
The (two-clause) FreeBSD License