Retrieves if the specified cell is selected. 
      Syntax
         
         public boolean isImageCellSelected (long x, long y)
       
      Parameters
         
         
            - 
               x – 
               horizontal cell. In other words, the column.
            
 
            - 
               y – 
               vertical cell. In other words, the row.
            
 
         
       
      Returns
         true if the specified cell is selected, false if the specified cell is not selected