43     int age = 0;  member in persons::person_with_private_data
49         return name == rhs.name && age == rhs.age && metadata == rhs.metadata;  in operator ==()
55         , age(age_)  in person_with_private_data()
59     NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_with_private_data, age, name, metadata)
66     int age = 0;  member in persons::person_without_private_data_1
71         return name == rhs.name && age == rhs.age && metadata == rhs.metadata;  in operator ==()
77         , age(age_)  in person_without_private_data_1()
81     NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_without_private_data_1, age, name, metadata)
88     int age = 0;  member in persons::person_without_private_data_2
93         return name == rhs.name && age == rhs.age && metadata == rhs.metadata;  in operator ==()
99         , age(age_)  in person_without_private_data_2()
104 NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(person_without_private_data_2, age, name, metadata)