use reified element type from supertype (performance opt)
use reified element type from supertype (performance opt)

jvasileff/ceylon.language,ceylon/ceylon.language,lucaswerkmeister/ceylon.language,lucaswerkmeister/ceylon.language,ceylon/ceylon.language,jvasileff/ceylon.language,unratito/ceylon.language,unratito/ceylon.language