message: Add multiple panel scrolls support to FixedLayout
diff: @@ -90,6 +90,13 @@ class FixedLayout extends React.Component<FixedLayoutProps & DOMProps & PanelCon
  onViewTransitionStart: EventListener = (e: CustomEvent<TransitionStartEventDetail>) => {
  let panelScroll = e.detail.scrolls[this.props.panel] || 0;
  +
  + // support for unstable ViewInfinite
  + if (Array.isArray(panelScroll)) {
  + const scrolls = panelScroll as number[];
  + panelScroll = scrolls[scrolls.length - 1] || 0;
  + }
  +
  const fromPanelHasScroll = this.props.panel === e.detail.from && panelScroll > 0;
  const toPanelHasScroll = this.props.panel === e.detail.to && panelScroll > 0;
  