Goes through the columns which are stored externally and ensures them in the external storage.
            
Namespace: CMS.DataEngineAssembly: CMS.DataEngine (in CMS.DataEngine.dll) Version: 8.0.0.0 (8.0.5239.26125)
Parameters
- deleteUnusedFiles
 - Type: 
System Boolean
If true, the old files are deleted when the path of the columnFile has changed 
- onlyIfChanged
 - Type: 
System Boolean
Tries to modify the external file only if the column is marked as changed 
See Also