message: Preview: fixed typings
diff: @@ -147,7 +147,7 @@ class TableOfContents extends React.PureComponent {
  {expanded ? <Icon28ChevronUpOutline fill="var(--text_tertiary)" /> : <Icon28ChevronDownOutline fill="var(--text_tertiary)" />}
  </IconButton>
  }
  - onClick={!section.href && this.onExpandCellClick}
  + onClick={!section.href ? this.onExpandCellClick : undefined}
  data-section-name={section.name}
  className={classNames({
  'TableOfContents__section--selected': section.name === this.state.currentSectionName,
  