openide/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/redundantCollectionOperation/beforeContainsAdd.java

// "Remove 'contains()' check" "true-preview"
import java.util.*;

class Test {
  void test(Set<String> set, String key) {
    if(!set.co<caret>ntains(key)) {
      set.add(key);
    }
  }
}