Fixed!

src/tests.ts

@@ -1,4 +1,4 @@
-import { Implements, TraitExpression, abstract, expression, trait } from "."
+import { Implements, abstract, expression, trait } from "."
 
 
 const PrintsHelloOnNew = trait(
@@ -57,8 +57,6 @@ const builder = expression
         StatefulSubscription,
     )
 
-type T = TraitExpression.AllTraits<typeof builder.expression>
-
 const exp = builder.get()
 type Abs = Implements<typeof exp>