code: function uncomment(editor, range, modelType) {
  	const commentParts = modelComments[modelType];
  	const stream = new BufferStreamReader(editor.getBuffer(), range.start, range);
  
  	// narrow down comment range till meanful content
  	stream.pos = range.start.translate([0, commentParts.before.length]);
  	stream.eatWhile(isSpace);
  	stream.start = stream.pos;
  
  	// Make sure comment ends with proper token
  	stream.pos = range.end.translate([0, -commentParts.after.length]);
  	if (editor.getTextInBufferRange([stream.pos, range.end]) === commentParts.after) {
  		while (!stream.sof()) {
  			if (!isSpace(stream.backUp(1))) {
  				stream.next();
  				break;
  			}
  		}
  	} else {
  		stream.pos = range.end;
  	}
  
  	const start = new Range(range.start, stream.start);
  	const end = new Range(stream.pos, range.end);
  	const delta = {
  		start: editor.getTextInBufferRange(start).length,
  		end: editor.getTextInBufferRange(end).length
  	};
  
  	editor.setTextInBufferRange(end, '');
  	editor.setTextInBufferRange(start, '');
  
  	return delta;
  }
docs: Un-comments given range in text editor
  @param  {TextEditor} editor
  @param  {Range}      range
  @param  {String}     modelType
  @return {Object}     Returns delta of removed characters from