public GridViewAdapter(IEnumerable items, RecyclerView recyclerView, FormsGridView gridView, DisplayMetrics displayMetrics)
 {
     Items           = items;
     _recyclerView   = recyclerView;
     Element         = gridView;
     _displayMetrics = displayMetrics;
     _gridView       = gridView;
 }
 public GridViewScrollListener(FormsGridView gridView, ScrollRecyclerView recyclerView)
 {
     _gridView     = gridView;
     _recyclerView = recyclerView;
 }