CustomLastItemVisible changes

[Ganeshkaredla]

@asmyshlyaev177

Here we had a use case instead of getting a callback for onLastItemVisible we need to call that before 3 or 4 items from the last

so as per the code in scrollMenu file

//original line in `checkFirstLastItemVisibility` method

 lastItemVisible = visibleItems.includes(menuItems.slice(-1)[0]);
 
 //modified line 
 
 lastItemVisible = visibleItems.includes(menuItems.slice( -4 )[0]);

Here let's say 4 is our customItem where we need to trigger call back, is it ok to change here?
Or need to do changes in any other places?