Non-inlinable method definitions for non-templatized classes and template specializations implementing the GOF Command Pattern, and STL-style functors.
Based on Command Pattern implementations originally done by
Carlos O'Ryan <firstname.lastname@example.org> Douglas C. Schmidt <email@example.com> Sergio Flores-Gaitan <firstname.lastname@example.org>
and on STL-style functor implementations originally done by
Irfan Pyarali <email@example.com>