I apologize, but there is no such class called JsonManagedReference in the Apache Commons IO library. JsonManagedReference is not a class from Apache Commons IO. It's a class from Jackson library.

Here is an example of using the JsonManagedReference and JsonBackReference annotations from the Jackson library to handle bidirectional relationships during serialization of an object to JSON:

import com.fasterxml.jackson.annotation.JsonManagedReference;
import com.fasterxml.jackson.annotation.JsonBackReference;

public class Person {
    private String name;
    private int age;
    @JsonManagedReference
    private Address address;

    public Person(String name, int age, Address address) {
        this.name = name;
        this.age = age;
        this.address = address;
    }
    public String getName() {
        return name;
    }
    public int getAge() {
        return age;
    }
    public Address getAddress() {
        return address;
    }
}

public class Address {
    private String street;
    private String city;
    @JsonBackReference
    private Person person;

    public Address(String street, String city, Person person) {
        this.street = street;
        this.city = city;
        this.person = person;
    }
    public String getStreet() {
        return street;
    }
    public String getCity() {
        return city;
    }
    public Person getPerson() {
        return person;
    }
}

In this example, the Person class has a bidirectional relationship with the Address class. The address field in the Person class is annotated with @JsonManagedReference, and the person field in the Address class is annotated with @JsonBackReference.

These annotations tell Jackson to only include the forward part of the relationship (the "managed" part) when serializing to JSON, and to exclude the back part of the relationship (the "back" reference) to avoid infinite recursion.

Make sure that you are using jackson as serializer.