op.addHeader("nAme", "value");
assertEquals(op.getHeaders().getFirst("NaMe"), "value");
op.setContentType(MediaType.TEXT_PLAIN);
op.setBody(body);
bomp.addPart(op);
MediaType mt = MediaType.valueOf("multipart/mixed; boundary=" + bounary);
MultivaluedMapImpl<String, Object> headers = new MultivaluedMapImpl<String, Object>();
ByteArrayInputStream bais =
serilizedAndGetInputStrem(bomp, BufferedOutMultiPart.class, mt, headers);