Don't compile me.

InfinityMemoryIncrement.swift

public struct _ModelX<_ModelN: Codable>: Codable {
    public var model0: _ModelN
    public var model1: Bool?
    public var model2: Bool?
    public var model3: Bool?
    public var model4: Bool?
    public var model5: Bool?
    public var model6: Bool?
    public var model7: Bool?
    public var model8: Bool?
    public var model9: Bool?
    public var model10: Bool?
    public var model11: Bool?
    public var model12: Bool?
    public var model13: Bool?
    public var model14: Bool?
    public var model15: Bool?
    public var model16: Bool?
    public var model17: Bool?
    public var model18: Bool?
    public var model19: Bool?
}

public typealias ModelX = _ModelX<Bool?>

public protocol ModelXConvertible {
    func asModelX() -> ModelX
}

extension _ModelX: ModelXConvertible {
    public func asModelX() -> ModelX {
        return ModelX(
            model1: model1,
            model0: (model0 as _ModelN) as? Bool,
            model2: model2,
            model3: model3,
            model4: model4,
            model5: model5,
            model6: model6,
            model7: model7,
            model8: model8,
            model9: model9,
            model10: model10,
            model11: model11,
            model12: model12,
            model13: model13,
            model14: model14,
            model15: model15,
            model16: model16,
            model17: model17,
            model18: model18,
            model19: model19
        )
    }
}

public extension ModelXConvertible {
    public var model0: Bool? { return asModelX().model0 }
    public var model1: Bool? { return asModelX().model1 }
    public var model2: Bool? { return asModelX().model2 }
    public var model3: Bool? { return asModelX().model3 }
    public var model4: Bool? { return asModelX().model4 }
    public var model5: Bool? { return asModelX().model5 }
    public var model6: Bool? { return asModelX().model6 }
    public var model7: Bool? { return asModelX().model7 }
    public var model8: Bool? { return asModelX().model8 }
    public var model9: Bool? { return asModelX().model9 }
    public var model10: Bool? { return asModelX().model10 }
    public var model11: Bool? { return asModelX().model11 }
    public var model12: Bool? { return asModelX().model12 }
    public var model13: Bool? { return asModelX().model13 }
    public var model14: Bool? { return asModelX().model14 }
    public var model15: Bool? { return asModelX().model15 }
    public var model16: Bool? { return asModelX().model16 }
    public var model17: Bool? { return asModelX().model17 }
    public var model18: Bool? { return asModelX().model18 }
    public var model19: Bool? { return asModelX().model19 }
}