Revert "Relationship temporarily fixed to not extend Expressions"
Revert "Relationship temporarily fixed to not extend Expressions"

This reverts commit 9cc59c9352aed774d8dec02c67217bf1f7553e0e.

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