code: @Override
  	public Response updateCorpInfo(String CorpNum, CorpInfo corpInfo) throws PopbillException {
  		String postData = toJsonString(corpInfo);
  
  		return httppost("/CorpInfo", CorpNum, postData, null, Response.class);
  	}
docs: /*
  (non-Javadoc)
  @see com.popbill.api.BaseService#updateCorpInfo(java.lang.String, com.popbill.api.CorpInfo, java.lang.String)