restore old from-json for backends without Uni (JVM)
restore old from-json for backends without Uni (JVM)

salortiz/rakudo,rakudo/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,labster/rakudo,labster/rakudo,nbrown/rakudo,tony-o/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,salortiz/rakudo,MasterDuke17/rakudo,labster/rakudo,rakudo/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,salortiz/rakudo,tony-o/rakudo,nbrown/rakudo,MasterDuke17/rakudo,labster/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,tbrowder/rakudo,salortiz/rakudo,nbrown/rakudo,nbrown/rakudo,nbrown/rakudo,nbrown/rakudo,rakudo/rakudo,rakudo/rakudo,tony-o/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,tbrowder/rakudo,tony-o/rakudo,tony-o/rakudo,MasterDuke17/rakudo