Null exams field leads to decoding issue

[Archichil]

The API response contains "exams": null (ex.451001 451001.json), which results in valueNotFound(Swift.Array<Any>, Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "exams", intValue: nil)], debugDescription: "Cannot get unkeyed decoding container -- found null value instead", underlyingError: nil)). This group is new to uni and don't have a schedule yet, so some fields are unexpectedly null. This problem can be solved by setting public let examSchedules: [Pair] optional. Is it worth doing this? I don't know :) Another unusual move made by ЦИИР.