Working on the type checker

idea/testData/psi/examples/util/Comparison.jet

@@ -1,6 +1,6 @@
 type Comparison<in T> = {(T, T) : Int}
 
-fun naturalOrder<in T : IComparable<T>>(a : T, b : T) : Int = a.compareTo(b)
+fun naturalOrder<in T : Comparable<T>>(a : T, b : T) : Int = a.compareTo(b)
 
 fun castingNaturalOrder(a : Object, b : Object) : Int = (a as Comparable<Object>).compareTo(b as Comparable<Object>)
 

idea/testData/psi/examples/util/IComparable.jet

@@ -1,3 +1,3 @@
-interface class IComparable<in T> {
+virtual class IComparable<in T> {
   fun compareTo(other : T) : Int
 }