src/java.base/share/classes/java/lang/reflect/Method.java

@@ -287,10 +287,15 @@
       if (getGenericSignature() != null) {
         return getGenericInfo().getReturnType();
       } else { return getReturnType();}
     }
 
+    @Override
+    Class<?>[] getSharedParameterTypes() {
+        return parameterTypes;
+    }
+
     /**
      * {@inheritDoc}
      */
     @Override
     public Class<?>[] getParameterTypes() {