+import jalview.datamodel.Alignment;
+import jalview.datamodel.AlignmentI;
+import jalview.datamodel.DBRefEntry;
+import jalview.datamodel.DBRefSource;
+import jalview.datamodel.SequenceFeature;
+import jalview.datamodel.SequenceI;
+import jalview.io.FormatAdapter;
+import jalview.io.IdentifyFile;
+import jalview.util.DBRefUtils;
+import jalview.util.MessageManager;
+import jalview.ws.dbsources.das.api.DasSourceRegistryI;
+import jalview.ws.seqfetcher.DbSourceProxy;