src/vs/workbench/contrib/comments/browser/commentsEditorContribution.ts/CommentController/getWithoutCommentsEditorOptions
class CommentController:	private getWithoutCommentsEditorOptions(editor: ICodeEditor, extraEditorClassName: string[], startingLineDecorationsWidth: number) {
		let lineDecorationsWidth = startingLineDecorationsWidth;
		const inlineCommentPos = extraEditorClassName.findIndex(name => name === 'inline-comment');
		if (inlineCommentPos >= 0) {
			extraEditorClassName.splice(inlineCommentPos, 1);
		}

		const options = editor.getOptions();
		if (options.get(EditorOption.folding) && options.get(EditorOption.showFoldingControls) !== 'never') {
			lineDecorationsWidth += 11; // 11 comes from https://github.com/microsoft/vscode/blob/94ee5f58619d59170983f453fe78f156c0cc73a3/src/vs/workbench/contrib/comments/browser/media/review.css#L485
		}
		lineDecorationsWidth -= 24;
		return { extraEditorClassName, lineDecorationsWidth };
	}