packages/webiny-app-cms/src/editor/actions/history/reducer.js
function jumpToPast(history, index) {
    if (index < 0 || index >= history.past.length) return history;

    const { past, future, _latestUnfiltered } = history;

    const newPast = past.slice(0, index);
    const newFuture = [...past.slice(index + 1), _latestUnfiltered, ...future];
    const newPresent = past[index];

    return newHistory(newPast, newPresent, newFuture);
}
function jumpToPast(history, index) {
    if (index < 0 || index >= history.past.length) return history;

    const { past, future, _latestUnfiltered } = history;

    const newPast = past.slice(0, index);
    const newFuture = [...past.slice(index + 1), _latestUnfiltered, ...future];
    const newPresent = past[index];

    return newHistory(newPast, newPresent, newFuture);
}
function jumpToPast ( history , index ) { if ( index < 0 || index >= history . past . length ) return history ; const { past , future , _latestUnfiltered } = history ; const newPast = past . slice ( 0 , index ) ; const newFuture = [ ... past . slice ( index + 1 ) , _latestUnfiltered , ... future ] ; const newPresent = past [ index ] ; return newHistory ( newPast , newPresent , newFuture ) ; }
jumpToPast: jump to requested index in past history
jumpToPast : jump to requested index in past history