[tests] generic vararg decompilation test case (IDEA-204272)

testData/src/pkg/TestGenericArgs.java

@@ -0,0 +1,15 @@
+package pkg;
+
+public class TestGenericArgs {
+  private static <T> void genericSingle(Class<T> param) { }
+
+  private static <T> void genericVarArgs(Class<T>... param) { }
+
+  private static <T> void genericArray(Class<T>[] param) { }
+
+  private static <T> void single(Class param) { }
+
+  private static <T> void varArgs(Class... param) { }
+
+  private static <T> void array(Class[] param) { }
+}