void () { doTest("import java.util.*;\n" + "\n" + "class X {\n" + " boolean test(HashSet<String> set1, TreeSet<String> set2) {\n" + " return set1.equals(set2); // can be equal by content\n" + " }\n" + "\n" + " boolean test2(HashSet<String> set1, TreeSet<Integer> set2) {\n" + " return set1./*'equals' between objects of inconvertible types 'HashSet<String>' and 'TreeSet<Integer>'*/equals/**/(set2);\n" + " }\n" + "}"); }