@Test public void test_3719() { checkIsSubtype("null","null"); }
@Test public void test_3720() { checkIsSubtype("null","null"); }
@Test public void test_3721() { checkIsSubtype("null","null"); }
private void checkIsSubtype(String from, String to) {
Type ft = Type.fromString(from);
Type tt = Type.fromString(to);
assertTrue(Type.isSubtype(ft,tt));
}