Spell out the package explicitly.
This commit is totally textual, and does not change any logic.
The swiss-army knife package may serve a kick-start in early
stage development. But as the codebase growing, we might want
to retire it gradually:
For simple wrapping functions, just inline it on the call site.
For larger pice of code, make it an independent package.
Tzu-Jung Lee
Ethan Buchman
Jae Kwon