public class Main {

  @RequiredArgsConstructor
  private static class Left extends Throwable {
    private final Object left;

    public <T> T getLeft() {
      return (T)left;
    }
  }

  @RequiredArgsConstructor
  private static class Right extends Throwable {
    private final Object right;

    public <T> T getRight() {
      return (T)right;
    }
  }

  private static Throwable function(int x) {
    if (x > 10) {
      return new Left("asdf");
    }
    return new Right(15);
  }
  public static void main(String[] args) {
    var result = function(7);
    try {
      throw result;
    } catch (Left l) {
      System.out.println(l.<String>getLeft());
    } catch (Right r) {
      System.out.println(r.<Integer>getRight());
    } catch (Throwable throwable) {
      throwable.printStackTrace();
    }
  }
}