src/vs/workbench/api/common/extHostTimeline.ts/ExtHostTimeline/$getTimeline
class ExtHostTimeline:	async $getTimeline(id: string, uri: UriComponents, options: vscode.TimelineOptions, token: vscode.CancellationToken, internalOptions?: InternalTimelineOptions): Promise<Timeline | undefined> {
		const provider = this._providers.get(id);
		return provider?.provideTimeline(URI.revive(uri), options, token, internalOptions);
	}