src/vs/workbench/api/node/extHostOutputService.ts/ExtHostOutputService2/createOutputChannel
class ExtHostOutputService2:	override createOutputChannel(name: string): vscode.OutputChannel {
		name = name.trim();
		if (!name) {
			throw new Error('illegal argument `name`. must not be falsy');
		}
		const extHostOutputChannel = this._doCreateOutChannel(name);
		extHostOutputChannel.then(channel => channel._id.then(id => this._channels.set(id, channel)));
		return new LazyOutputChannel(name, extHostOutputChannel);
	}