code: func (c ColorFormatter) Format(w io.Writer, entry zapcore.Entry, fields []zapcore.Field) {
  	switch {
  	case c.Reset:
  		fmt.Fprintf(w, ResetColor())
  	case c.Bold:
  		fmt.Fprintf(w, c.LevelColor(entry.Level).Bold())
  	default:
  		fmt.Fprintf(w, c.LevelColor(entry.Level).Normal())
  	}
  }
docs: // Format writes the SGR color code to the provided writer.