Remove `__init` calling `super.__init`.
Remove `cb` from tracking in net.
Queries need to be wrapped in an array.
Simplify a branch operation.
Add class name to error messages.
Fix a missed vararg update.
Compose query vars correctly.
Lua indices start at 1.
Lua tables can't contain `nil` values.
Keys are iterated with `pairs`.
Remove extra local variable.
Check if optargs is `nil`.
`__init` returns are discarded.
Compare classes by name.
Add `arity` optarg to determine function building.
Loop in `next` until the server creates a response.
Make changefeed tests deterministic.