aloof-angle-91616
01/19/2019, 2:31 AMoutput_constraint
into output_type
as per https://github.com/pantsbuild/pants/issues/4535#issuecomment-455735882 (before implementing @union_rule
and @union_member_rule
) but going to look into collection typing first https://github.com/pantsbuild/pants/issues/6936