question: public static ExportMask createExportMask ( DbClient dbClient , ExportGroup exportGroup , URI sdUri , String maskName ) throws DatabaseException { ExportMask exportMask = new ExportMask ( ) ; exportMask . setId ( URIUtil . createId ( ExportMask . class ) ) ; exportMask . setMaskName ( maskName ) ; exportMask . setStorageDevice ( sdUri ) ; dbClient . createObject ( exportMask ) ; exportGroup . addExportMask ( exportMask . getId ( ) ) ; dbClient . updateObject ( exportGroup ) ; return exportMask ; }
target:  Create an export mask object. The actual mask is created at the array by the controller service.