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func logError(_ logMessage: String, functionName: String = #function, filePath: String = #file, lineNumber: Int = #line, userInfo: [String: Any] = [:]) {
  guard let fileName = NSURL(fileURLWithPath: filePath).lastPathComponent else {
    return
  }
  
  #if (arch(i386) || arch(x86_64)) && os(iOS)
    print("[\(fileName):\(lineNumber)] \(functionName) \(logMessage) \(userInfo)")
  #else
    var properties = userInfo
    properties["Filename"] = fileName
    properties["Line number"] = lineNumber
    properties["Function name"] = functionName
    properties["Log"] = logMessage
    mixpanel.track(event: "System Error",
                   properties: properties)
  #endif
}