message: clarify which NumberSize to use
diff: @@ -132,7 +132,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
  e: MouseEvent | TouchEvent,
  travelDirection: Direction,
  refToElement: HTMLDivElement,
  - delta: { width: number, height: number }, // TODO: Use NumberSize from re-resizer when it is exposed
  + delta: { width: number, height: number }, // TODO: Use re-resizer's NumberSize when it is exposed as the type
  ) => {
  // Do some sanity checks, but in reality we shouldn't need these.
  if (travelDirection !== "bottom") return;
  