public EncodingServiceBuilder encodableContentTypes(MediaType... contentTypes) {
        return encodableContentTypes(ImmutableList.copyOf(requireNonNull(contentTypes, "contentTypes")));
    }
Sets the specified {@link MediaType}s to evaluate whether the content type of the {@link HttpResponse}
is encodable or not. It's encodable when the content type is one of the {@link MediaType}s.
core/src/main/java/com/linecorp/armeria/server/encoding/EncodingServiceBuilder.java