src/vs/platform/terminal/node/ptyService.ts/XtermSerializer/_getSerializeConstructor
class XtermSerializer:	async _getSerializeConstructor(): Promise<typeof SerializeAddon> {
		if (!SerializeAddon) {
			SerializeAddon = (await import('xterm-addon-serialize')).SerializeAddon;
		}
		return SerializeAddon;
	}