src/vs/workbench/contrib/comments/browser/commentsTreeViewer.ts/CommentNodeRenderer/getCommentThreadWidgetStateColor
class CommentNodeRenderer:	private getCommentThreadWidgetStateColor(state: CommentThreadState | undefined, theme: IColorTheme): Color | undefined {
		return (state !== undefined) ? getCommentThreadStateColor(state, theme) : undefined;
	}