A log entry representation used to propagate information from Logger to individual Handlers.

class LogRecord {
 final Level level;
 final String message;

 /** Logger where this record is stored. */
 final String loggerName;

 /** Time when this record was created. */
 final DateTime time;

 /** Unique sequence number greater than all log records created before it. */
 final int sequenceNumber;

 static int _nextNumber = 0;

 /** Associated error (if any) when recording errors messages. */
 final Object error;

 /** Associated stackTrace (if any) when recording errors messages. */
 final StackTrace stackTrace;

 LogRecord(this.level, this.message, this.loggerName, [this.error,
                                                       this.stackTrace])
     : time = new DateTime.now(),
       sequenceNumber = LogRecord._nextNumber++;

 String toString() => '[${level.name}] $loggerName: $message';
}