src/vs/workbench/contrib/terminal/browser/xterm/xtermTerminal.ts/XtermTerminal/_getUnicode11Constructor
class XtermTerminal:	protected async _getUnicode11Constructor(): Promise<typeof Unicode11AddonType> {
		if (!Unicode11Addon) {
			Unicode11Addon = (await import('xterm-addon-unicode11')).Unicode11Addon;
		}
		return Unicode11Addon;
	}