src/vs/workbench/contrib/localHistory/browser/localHistoryTimeline.ts/LocalHistoryTimeline/toTimelineItem
class LocalHistoryTimeline:	private toTimelineItem(entry: IWorkingCopyHistoryEntry): TimelineItem {
		return {
			handle: entry.id,
			label: SaveSourceRegistry.getSourceLabel(entry.source),
			tooltip: new MarkdownString(`$(history) ${LOCAL_HISTORY_DATE_FORMATTER.value.format(entry.timestamp)}\n\n${SaveSourceRegistry.getSourceLabel(entry.source)}`, { supportThemeIcons: true }),
			source: LocalHistoryTimeline.ID,
			timestamp: entry.timestamp,
			themeIcon: LOCAL_HISTORY_ICON_ENTRY,
			contextValue: LOCAL_HISTORY_MENU_CONTEXT_VALUE,
			command: {
				id: API_OPEN_DIFF_EDITOR_COMMAND_ID,
				title: COMPARE_WITH_FILE_LABEL.value,
				arguments: toDiffEditorArguments(entry, entry.workingCopy.resource)
			}
		};
	}