code: public void addBodyAttribute(String name, String value) throws ErrorDataEncoderException {
          String svalue = value != null? value : StringUtil.EMPTY_STRING;
          Attribute data = factory.createAttribute(request, checkNotNull(name, "name"), svalue);
          addBodyHttpData(data);
      }
docs: Add a simple attribute in the body as Name=Value
  
  @param name
  name of the parameter
  @param value
  the value of the parameter
  @throws NullPointerException
  for name
  @throws ErrorDataEncoderException
  if the encoding is in error or if the finalize were already done