src/vs/workbench/contrib/terminal/browser/xterm/xtermTerminal.ts/XtermTerminal/_updateUnicodeVersion
class XtermTerminal:	private async _updateUnicodeVersion(): Promise<void> {
		if (!this._unicode11Addon && this._configHelper.config.unicodeVersion === '11') {
			const Addon = await this._getUnicode11Constructor();
			this._unicode11Addon = new Addon();
			this.raw.loadAddon(this._unicode11Addon);
		}
		if (this.raw.unicode.activeVersion !== this._configHelper.config.unicodeVersion) {
			this.raw.unicode.activeVersion = this._configHelper.config.unicodeVersion;
		}
	}