message: Actually include the lazy loading function
diff: @@ -19,12 +19,38 @@ import {_t} from "../../../../languageHandler";
  import PropTypes from "prop-types";
  import SettingsStore from "../../../../settings/SettingsStore";
  import ToggleSwitch from "../../elements/ToggleSwitch";
  +const Modal = require("../../../../Modal");
  +const sdk = require("../../../../index");
  export class LabsSettingToggle extends React.Component {
  static propTypes = {
  featureId: PropTypes.string.isRequired,
  };
  + async _onLazyLoadChanging(enabling) {
  + // don't prevent turning LL off when not supported
  + if (enabling) {
  + const supported = await MatrixClientPeg.get().doesServerSupportLazyLoading();
  + if (!supported) {
  + await new Promise((resolve) => {
  + const QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
  + Modal.createDialog(QuestionDialog, {
  + title: _t("Lazy loading members not supported"),
  + description:
  + <div>
  + { _t("Lazy loading is not supported by your " +
  + "current homeserver.") }
  + </div>,
  + button: _t("OK"),
  + onFinished: resolve,
  + });
  + });
  + return false;
  + }
  + }
  + return true;
  + }
  +
  _onChange = async (checked) => {
  if (this.props.featureId === "feature_lazyloading") {
  const confirmed = await this._onLazyLoadChanging(checked);
  