public static Slime jsonToSlimeOrThrow(String json) {
        return jsonToSlimeOrThrow(json.getBytes(StandardCharsets.UTF_8));
    }
@Test
    public void test_json_to_slime_or_throw() {
        Slime slime = SlimeUtils.jsonToSlimeOrThrow("{\"foo\":\"foobie\",\"bar\":{}}");
        assertEquals("foobie", slime.get().field("foo").asString());
        assertTrue(slime.get().field("bar").valid());
    }