{
    "age1": "adult_age",
    "age2": ["adult_age"],
    "age3": [ { "adult_age": [] } ],
    "age4": { "adult_age": [] },
    "age1_custom_error": "adult_age_with_custom_error",
    "age2_custom_error": ["adult_age_with_custom_error"],
    "age3_custom_error": [ { "adult_age_with_custom_error": [] } ],
    "age4_custom_error": { "adult_age_with_custom_error": [] }
}