def report_fields(report_type)
      soap_message = service.report_definition.report_fields(credentials, report_type)
      add_counters(soap_message.counters)
      els = soap_message.response.xpath("//getReportFieldsResponse/rval")
      els.map do |el|
        ReportField.from_element(el)
      end
    end
def report_fields(report_type)
      soap_message = service.report_definition.report_fields(credentials, report_type)
      add_counters(soap_message.counters)
      els = soap_message.response.xpath("//getReportFieldsResponse/rval")
      els.map do |el|
        ReportField.from_element(el)
      end
    end
Query the list of field for a report type
 @param [ReportDefinition::ReportTypes] a value of