question: If the left image shows one case with at least some contents visible.
#1 return left image 
#2 return case in  #1 
#3 return contents of #2 
#4 return #3 that are visible 
#5 return number of  #4 for each  #2 
#6 return #2 where  #5 is at least one 
#7 return number of  #6 
#8 return if  #7 is equal to  one