// "Replace Optional presence condition with functional style expression" "GENERIC_ERROR_OR_WARNING"

import java.util.Optional;
import java.util.function.Function;
import java.util.function.Supplier;

public class Main {

  public void test(Optional<String> opt, Function<String, Object> onPresent, Supplier<Object> onEmpty) {
    // warning level: no semantics change
    Object o = opt.map(onPresent::apply).orElse(null);
  }
}