src/vs/workbench/contrib/output/browser/outputServices.ts/OutputService/showChannel
class OutputService:	async showChannel(id: string, preserveFocus?: boolean): Promise<void> {
		const channel = this.getChannel(id);
		if (this.activeChannel?.id !== channel?.id) {
			this.setActiveChannel(channel);
			this._onActiveOutputChannel.fire(id);
		}
		const outputView = await this.viewsService.openView<OutputViewPane>(OUTPUT_VIEW_ID, !preserveFocus);
		if (outputView && channel) {
			outputView.showChannel(channel, !!preserveFocus);
		}
	}