openide/java/java-tests/testData/inspection/inefficientStreamCount/afterFlatMapLambda.java

// "Replace with 'Stream.mapToLong().sum()'" "true-preview"

import java.util.List;

public class Main {
  private String s;

  public Main(List<List<String>> s) {
    long count = s.stream().mapToLong((strings) -> {
      return (strings.size());
    }).sum();
  }
}