public class Test {
     private void test_noLambda() {
         if (getThing() instanceof Number number) {
             System.out.println(number);
         }
     }
     private void test_withLambda() {
         Runnable run = () -> {
             if (getThing() instanceof Number number) {
                 System.out.println(number);
             }
         };
     }
     private Object getThing() {
         return null;
     }
}