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package log type Level int func (l Level) String() string { switch l { case LevelDebug: return "DEBUG" case LevelInfo: return "INFO" case LevelWarn: return "WARN" case LevelError: return "ERROR" default: return "" } } const ( LevelDebug Level = -4 LevelInfo Level = 0 LevelWarn Level = 4 LevelError Level = 8 )