Code changes now that `Tuple` types get erased to `Sequence` in certain cases (see #1268)
Code changes now that `Tuple` types get erased to `Sequence` in certain cases (see #1268)

gijsleussink/ceylon,gijsleussink/ceylon,gijsleussink/ceylon,gijsleussink/ceylon,gijsleussink/ceylon