Revert "Made abstract false by default"
Revert "Made abstract false by default"

This reverts commit d0d3ea8d27b4da5ccc5391dd81819e3768200e39.

jacksonic/vjlofvhjfgm,jacksonic/vjlofvhjfgm,foam-framework/foam2,jacksonic/vjlofvhjfgm,foam-framework/foam2,foam-framework/foam2,foam-framework/foam2,foam-framework/foam2