code: def _StartAnalysisProcesses(self, storage_writer, analysis_plugins):
      
      logger.info('Starting analysis plugins.')
  
      for analysis_plugin in analysis_plugins.values():
        self._analysis_plugins[analysis_plugin.NAME] = analysis_plugin
  
        process = self._StartWorkerProcess(analysis_plugin.NAME, storage_writer)
        if not process:
          logger.error('Unable to create analysis process: {0:s}'.format(
              analysis_plugin.NAME))
  
      logger.info('Analysis plugins running')
docs: Starts the analysis processes.
  
      Args:
        storage_writer (StorageWriter): storage writer.
        analysis_plugins (dict[str, AnalysisPlugin]): analysis plugins that
            should be run and their names.