openide/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addAssert/beforeLambda.java

// "Assert 'container != null'" "true-preview"
import java.util.function.Supplier;

class A{
  void test(){
    Object container = Math.random() > 0.5 ? "" : null;
    Supplier<String> r = () -> Math.random() > 0.5 ? container.toS<caret>tring() : "";
  }
}