Utility class containing constants. 
            Represents error bar display type.
            
| Field Summary | 
| const  Number | BOTH |  | 
| 
            Both
             | 
| const  Number | MINUS |  | 
| 
            Minus
             | 
| const  Number | NONE |  | 
| 
            None
             | 
| const  Number | PLUS |  | 
| 
            Plus
             | 
 
- 
- Field Detail- BOTH- 
const Number BOTH - 
            Both
            
 
 - MINUS- 
const Number MINUS - 
            Minus
            
 
 - NONE- 
const Number NONE - 
            None
            
 
 - PLUS- 
const Number PLUS - 
            Plus