src/vs/workbench/api/browser/mainThreadComments.ts/MainThreadComments/$onDidCommentThreadsChange
class MainThreadComments:	$onDidCommentThreadsChange(handle: number, event: modes.CommentThreadChangedEvent) {
		// notify comment service
		const providerId = this.getHandler(handle);
		this._commentService.updateComments(providerId, event);
	}