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Check if a string is empty or contains only whitespace characters.
Source position: syshelph.inc line 64
| public class function TStringHelper.IsNullOrWhiteSpace( | 
| const AValue: string | 
| ):Boolean; | 
IsNullOrEmpty returns True if string A has length 0 or contains only whitespace characters (characters with ASCII code 32 or less).
| 
 | Check if a string is empty | |
| 
 | Trim whitespace from the ends of a string. |