docs: public static TransfersResult mmpaymkttransfersPromotionTransfers(Transfers transfers,String key){
  		Map<String,String> map = MapUtil.objectToMap( transfers);
  		String sign = SignatureUtil.generateSign(map,transfers.getSign_type(),key);
  		transfers.setSign(sign);
  		String secapiPayRefundXML = XMLConverUtil.convertToXML( transfers);
  		HttpUriRequest httpUriRequest = RequestBuilder.post()
  				.setHeader(xmlHeader)
  				.setUri(baseURI()+ "/mmpaymkttransfers/promotion/transfers")
  				.setEntity(new StringEntity(secapiPayRefundXML,Charset.forName("utf-8")))
  				.build();
  		return LocalHttpClient.keyStoreExecuteXmlResult(transfers.getMchid(),httpUriRequest,TransfersResult.class,transfers.getSign_type(),key);
  	}