src/vs/workbench/api/browser/mainThreadComments.ts/MainThreadComments/$updateCommentThread
class MainThreadComments:	$updateCommentThread(handle: number,
		commentThreadHandle: number,
		threadId: string,
		resource: UriComponents,
		changes: CommentThreadChanges): void {
		const provider = this._commentControllers.get(handle);

		if (!provider) {
			return undefined;
		}

		return provider.updateCommentThread(commentThreadHandle, threadId, resource, changes);
	}