IDEA-149077 Default decompiler is chosen for several classes instead of Fernflower - tests

testData/obfuscated/k.java

@@ -0,0 +1,7 @@
+import java.util.Collection;
+
+public interface k<T> {
+   void a(T var1);
+
+   void a(Collection<? extends T> var1);
+}