code: def headers(self):
          
          action = self.method.soap.action
          result = {
              'Content-Type': 'text/xml; charset=utf-8',
              'SOAPAction': action
          }
          result.update(self.options.headers)
          log.debug('headers = %s', result)
          return result
docs: Get http headers or the http/https request.
          @return: A dictionary of header/values.
          @rtype: dict