core/module.rbs in rbs-2.6.0 vs core/module.rbs in rbs-2.7.0.pre.1

@@ -1399,10 +1399,10 @@
   # -->
   # Refine *mod* in the receiver.
   #
   # Returns a module, where refined methods are defined.
   #
-  def refine: (Class arg0) { (untyped arg0) -> untyped } -> self
+  def refine: (Module mod) { () -> void } -> Refinement
 
   # <!--
   #   rdoc-file=object.c
   #   - remove_class_variable(sym)    -> obj
   # -->