src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java

@@ -1735,10 +1735,16 @@
                 MemberName memberName = (MemberName)mname;
                 return memberName.getName();
             }
 
             @Override
+            public MethodType getMethodType(Object mname) {
+                MemberName memberName = (MemberName)mname;
+                return memberName.getMethodType();
+            }
+
+            @Override
             public boolean isNative(Object mname) {
                 MemberName memberName = (MemberName)mname;
                 return memberName.isNative();
             }