Update doc page

Author: odersky

docs/docs/reference/dropped-features/package-objects.md

@@ -42,3 +42,6 @@ in a source file `src.scala`, it could be invoked from the command line using a
 "program name" is mangled it is recommended to always put `main` methods in explicitly named objects.
 
 **Note 3:** The notion of `private` is independent of whether a definition is wrapped or not. A `private` toplevel definition is always visible from everywhere in the enclosing package.
+
+**Note 4:** If several wrapper objects contain toplevel definitions with the same name,
+only the definition that is compiled last is retained. As a consequence, it is impossible to have overloaded toplevel definitions in different files, as the alternatives in the last-compiled file always replace the alternatives compiled earlier.