public JsonConditionalResponseAs<T> orElseJson(
            Class<? extends T> clazz, Predicate<AggregatedHttpResponse> predicate) {
        return orElseJson(clazz, OBJECT_MAPPER, predicate);
    }
Sets the {@link Predicate} and {@link Class} that the content is deserialized into the {@link Class}
when the {@link AggregatedHttpResponse} passes the {@link Predicate}.
core/src/main/java/com/linecorp/armeria/client/JsonConditionalResponseAs.java