vlib/v/checker/tests/generic_sumtype_decl_err_a.vv:7:24: error: generic struct `Just` must specify generic type names, e.g. Just[T]
    5 | struct Nothing {}
    6 | 
    7 | type Maybe = Nothing | Just
      |                        ~~~~
    8 | 
    9 | fn main() {
vlib/v/checker/tests/generic_sumtype_decl_err_a.vv:7:6: error: generic sumtype `Maybe` must specify generic type names, e.g. Maybe[T]
    5 | struct Nothing {}
    6 | 
    7 | type Maybe = Nothing | Just
      |      ~~~~~
    8 | 
    9 | fn main() {
