ClassAfterDependencyInjection.swift

class BreadcrumbLogger {
    
    private let recorder: AWSFirehoseRecorder
    
    init(recorder: AWSFirehoseRecorder = AWSFirehoseRecorder.default()) {
        self.recorder = recorder
    }
    
    private func breadcrumbDictionary(breadcrumb: Breadcrumb) -> Dictionary<String, AnyObject?> {
        let breadcrumbDictionary: Dictionary<String, AnyObject?> = [
            /* snip */
        :]
        return breadcrumbDictionary
    }
    
    func logBreadcrumbs(breadcrumbs: [Breadcrumb]) {
        for breadcrumb in breadcrumbs.map(breadcrumbDictionary) {
            let json = JSON(breadcrumb)
            let data = try? json.rawData()
            if let data = data {
                _ = recorder.saveRecord(data, streamName: BreadcrumbLoggerStreamName)
            } else { // log error 
            }
        }
        _ = recorder.submitAllRecords()
    }
}