{
    "duplicateWhereBuilderClassName": "Espo\\Classes\\DuplicateWhereBuilders\\General",
    "relationships": {
        "contacts": {
            "mandatoryAttributeList": ["accountIsInactive"]
        },
        "targetLists": {
            "mandatoryAttributeList": ["isOptedOut"]
        },
        "opportunities": {
            "linkOnlyNotLinked": true
        }
    }
}