src/vs/workbench/contrib/comments/browser/commentsEditorContribution.ts/CommentingRangeDecorator/constructor
class CommentingRangeDecorator:	constructor() {
		const decorationOptions: IModelDecorationOptions = {
			description: 'commenting-range-decorator',
			isWholeLine: true,
			linesDecorationsClassName: 'comment-range-glyph comment-diff-added'
		};

		this.decorationOptions = ModelDecorationOptions.createDynamic(decorationOptions);
	}