| 
           filled | sparse 
         | 
        
| 
           on | off 
         | 
        |||
| 
           on | off 
         | 
        
| 
           on | off 
         | 
        |||
| 
           on | off 
         | 
        |||
| 
           on | off 
         | 
        |||
| 
           on | index 
         | 
        |||
| 
           on | off 
         | 
        |||
| 
           on | off 
         | 
        |||
| 
           on | off 
         | 
        |||
| 
           on | off 
         | 
        
| 
           on | off 
         | 
        |||