code: public KieServerHttpRequest form(final Object name, final Object value, String charset ) throws KieServerHttpRequestException {
          if( !getRequestInfo().form ) {
              contentType(APPLICATION_FORM_URLENCODED, charset);
              getRequestInfo().form = true;
          }
          charset = getValidCharset(charset);
  
          RequestInfo requestInfo = getRequestInfo();
          requestInfo.form = true;
          requestInfo.charset = charset;
          requestInfo.setFormParameter(name.toString(), value);
  
          return this;
      }
docs: Form parameter methods -----------------------------------------------------------------------------------------------------