Code sample #2 from https://medium.com/@johnsundell/providing-a-unified-swift-error-api-3642cd3173f0

Providing-a-unified-Swift-error-API-1.swift

func loadSearchData(matching query: String) throws -> Data {
    let urlString = "https://my.api.com/search?q=\(query)"
    
    guard let url = URL(string: urlString) else {
        throw SearchError.invalidQuery(query)
    }
    
    do {
        return try Data(contentsOf: url)
    } catch {
        throw SearchError.dataLoadingFailed(url)
    }
}