error[E0599]: no method named `sub0` found for struct `OverseerBuilder<Missing<_>, Init<AwesomeSubSys>, Missing<f64>>` in the current scope
  --> tests/ui/err-08-duplicate-subsystem.rs:57:4
   |
22 | #[overlord(signal=SigSigSig, error=OverseerError, event=Event, gen=AllMessages)]
   | -------------------------------------------------------------------------------- method `sub0` not found for this
...
57 |         .sub0(AwesomeSubSys::default()) // Duplicate subsystem
   |          ^^^^-------------------------- help: remove the arguments
   |          |
   |          field, not a method