Issue919B.java

package classes;

import java.util.Map;
import java.util.Set;

public class Issue919B {

    @SuppressWarnings("nullness:return.type.incompatible")
    public static Map<String, InnerClass> otherMethod(Set<InnerClass> innerClassSet) {
        return null;
    }

    public static class InnerClass {

        InnerClass() {}

        InnerClass method(String a) {
            return new InnerClass();
        }
    }

    // This class is required in order to reproduce the error.
    public static class AnotherInnerClass {}
}