[LMS-2104] fixed compilation problems

SVN: 21182

openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/ExternalDataTable.java

@@ -394,7 +394,7 @@ public final class ExternalDataTable extends AbstractExternalDataBusinessObject
         {
             for (ExternalDataPE dataSet : entry.getValue())
             {
-                if (dataSet.isContainerDataSet())
+                if (dataSet.isContainer())
                 {
                     containerDataSets.add(dataSet.getCode());
                 }