code: def processes(self, plantuml_text):
          
          url = self.get_url(plantuml_text)
          try:
              response, content = self.http.request(url, **self.request_opts)
          except self.HttpLib2Error as e:
              raise PlantUMLConnectionError(e)
          if response.status != 200:
              raise PlantUMLHTTPError(response, content)
          return content
docs: Processes the plantuml text into the raw PNG image data.
          
          :param str plantuml_text: The plantuml markup to render
          :returns: the raw image data