FileSystemService.rollbackEntry Method
        
 Rolls the file or folder with the specified ID back to the specified revision number.
 
         
        Parameters
        
            - id
            
 
            - 
                
Type: String
The ID of the file or folder to rollback. 
            - revisionNumber
            
 
            - 
                
Type: Number
The revision number to rollback to. 
        
        Return Value
        
Type: jQuery.Promise
        
A promise object that is resolved when the call is complete.