FileSystemService.deleteOldEntityData Method
        
  Deletes data from entities which are not the current revision and were created before the specified date.
 
         
        Parameters
        
            - beforeDate
            
 
            - 
                
The before date, or null if no date restriction should be used.
             
            - entityIds
            
 
            - 
                
(optional)A list of specific entities to be processed, or null if all entities are to be processed.
             
            - tenantIds
            
 
            - 
                
(optional)A list of tenant IDs; only entities corresponding to the specified tenants will be processed. If null, all tenants will be processed.
             
        
        Return Value
        
Type: jQuery.Promise
        
Value: Object
        
A promise object that is resolved when the call is complete. 
 If successful, a list of dundas.filesystem.IdRevisionPair objects is returned.