message: make tsc happy
diff: @@ -88,8 +88,8 @@ interface IProps {
  // TODO: Use re-resizer's NumberSize when it is exposed as the type
  interface ResizeDelta {
  - width: number,
  - height: number,
  + width: number;
  + height: number;
  }
  type PartialDOMRect = Pick<DOMRect, "left" | "top" | "height">;
  @@ -98,6 +98,7 @@ interface IState {
  notificationState: ListNotificationState;
  contextMenuPosition: PartialDOMRect;
  isResizing: boolean;
  + height: number;
  }
  export default class RoomSublist2 extends React.Component<IProps, IState> {
  @@ -105,6 +106,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
  private sublistRef = createRef<HTMLDivElement>();
  private dispatcherRef: string;
  private layout: ListLayout;
  + private heightAtStart: number;
  constructor(props: IProps) {
  super(props);
  @@ -684,7 +686,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
  content = (
  <React.Fragment>
  <Resizable
  - size={{height: this.state.height}}
  + size={{height: this.state.height} as any}
  minHeight={minTilesPx}
  maxHeight={maxTilesPx}
  onResizeStart={this.onResizeStart}
  