shiftExpand method

(NavCtntPair<T>, NavigatableList<T>) shiftExpand(
  1. NavCtntPair<T> currentPages,
  2. Navigatable<T> insertPage
)

Implementation

(NavCtntPair<T>, NavigatableList<T>) shiftExpand(NavCtntPair<T> currentPages, Navigatable<T> insertPage){
  var shiftPair = shift(currentPages, insertPage);
  return (expandCollapse(shiftPair.$1, screenColumn)!, shiftPair.$2);
}