/**
 * Interface SCVirtualScrollerItem
 * Each rendered element in the virtual feed must implement this interface
 * and use these methods when necessary to avoid scroll position "jumping"
 * as the user scrolls and to
 */
export interface VirtualScrollerItemProps {
    /**
     * Save current state and when the component re-mount
     * restore previous state using props. It is used to keep a copy of
     * VirtualScroller state so that it could be quickly restored
     * in case the VirtualScroller component gets unmounted and then
     * re-mounted back again — for example, when the user navigates away
     * by clicking on a list item and then navigates "Back" to the list.
     * @param s
     */
    onStateChange?: (state: any) => void;
    /**
     * Must be called whenever a list item's height changes
     * (for example, when a user clicks an "Expand"/"Collapse" button of
     * a list item): it re-measures the item's height and updates VirtualScroller
     * layout. Every change in an item's height must come as a result of
     * changing some kind of a state, be it the item's state in VirtualScroller
     * via .onItemStateChange(), or some other state managed by the application.
     * Call this method to re-measure the current element.
     */
    onHeightChange?: () => void;
}