DataPreview.previewTransform Method
        
 Refreshes the data in the data grid with data for the given transform with optional startIndex and pageSize given.
 
         
        Parameters
        
            - dataCubeId
            
 
            - 
                
Type: String
The ID of the data cube the transform belongs to. 
            - transform
            
 
            - 
                
Type: Transform
The transform to get the data for. 
            - startIndex
            
 
            - 
                
Type: Number
(optional) Row start index.
Optional: True 
            - pageSize
            
 
            - 
                
Type: Number
(optional) Row page size.
Optional: True 
        
        Return Value
        
Type: jQuery.Promise
        
The jQuery promise which tracks when the preview has finished.