gf-3.1.6: lib/src/api/SymbolicFre.gf
--# -path=.:present:mathematical:prelude resource SymbolicFre = Symbolic with (Symbol = SymbolFre), (Grammar = GrammarFre) ;
--# -path=.:present:mathematical:prelude resource SymbolicFre = Symbolic with (Symbol = SymbolFre), (Grammar = GrammarFre) ;