src/vs/workbench/contrib/terminal/browser/xterm/xtermTerminal.ts/XtermTerminal/_getSerializeAddonConstructor
class XtermTerminal:	protected async _getSerializeAddonConstructor(): Promise<typeof SerializeAddonType> {
		if (!SerializeAddon) {
			SerializeAddon = (await import('xterm-addon-serialize')).SerializeAddon;
		}
		return SerializeAddon;
	}