You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: charsets.go
    path of file: ./repos/darktile/internal/app/darktile/termutil
    
    the code of the file until where you have to start completion: package termutil

var charSets = map[rune]*map[rune]rune{
	'0': &decSpecGraphics,
	'B': nil, // ASCII
	// @todo 1,2,A
}

var decSpecGraphics = map[rune]rune{
	0x5f: 0x00A0, // NO-BREAK SPACE
	0x60: 
    
func (t *Terminal) scsHandler(pty chan MeasuredRune, which int) bool {
	b := <-pty

	cs, ok := charSets[b.Rune]
	if ok {
		//terminal.logger.Debugf("Selected charset %v into G%v", string(b), which)
		t.activeBuffer.charsets[which] = cs
		return false
	}

	t.activeBuffer.charsets[which] = nil
	return false
}