+import jalview.analysis.AAFrequency;
+import jalview.api.FeatureColourI;
+import jalview.datamodel.SequenceGroup;
+import jalview.renderer.ResidueShader;
+import jalview.schemes.Blosum62ColourScheme;
+import jalview.schemes.ColourSchemeI;
+import jalview.schemes.FeatureColour;
+import jalview.schemes.PIDColourScheme;
+import jalview.schemes.ResidueProperties;
+import jalview.schemes.UserColourScheme;
+import jalview.util.MessageManager;
+