+import jalview.analysis.scoremodels.ScoreModels;
+import jalview.analysis.scoremodels.SimilarityParams;
+import jalview.api.analysis.ScoreModelI;
+import jalview.api.analysis.SimilarityParamsI;
+import jalview.datamodel.Alignment;
+import jalview.datamodel.AlignmentI;
+import jalview.datamodel.AlignmentView;
+import jalview.datamodel.ColumnSelection;
+import jalview.datamodel.SequenceI;
+import jalview.jbgui.GPCAPanel;
+import jalview.util.MessageManager;
+import jalview.viewmodel.AlignmentViewport;
+import jalview.viewmodel.PCAModel;
+