static BodyPart of(ContentDisposition contentDisposition, Publisher<? extends HttpData> publisher) {
        final HttpHeaders headers = HttpHeaders.builder().contentDisposition(contentDisposition).build();
        return of(headers, publisher);
    }
Returns a new {@link BodyPart} using the specified {@link ContentDisposition} and
{@link Publisher} of {@link HttpData}.
core/src/main/java/com/linecorp/armeria/common/multipart/BodyPart.java