How to use the @material/snackbar/foundation.MDCSnackbarFoundation function in @material/snackbar

super(props);
    const {timeoutMs, closeOnEscape, leading, stacked} = this.props;
    const classes = new Set();
    if (leading) {
      classes.add('mdc-snackbar--leading');
    }

    if (stacked) {
      classes.add('mdc-snackbar--stacked');
    }

    this.state = {
      classes,
    };

    this.foundation = new MDCSnackbarFoundation(this.adapter);
    if (timeoutMs) {
      this.foundation.setTimeoutMs(timeoutMs);
    }

    if (closeOnEscape) {
      this.foundation.setCloseOnEscape(closeOnEscape);
    }
  }
  get adapter(): MDCSnackbarAdapter {