--- /dev/null
+Clazz.declarePackage ("fr.orsay.lri.varna.models.rna");
+c$ = Clazz.declareType (fr.orsay.lri.varna.models.rna, "RNA");
+Clazz.defineMethod (c$, "getSize",
+function () {
+return 0;
+});
+Clazz.defineMethod (c$, "getStructDBN",
+function (b) {
+return null;
+}, "~B");