code: def start(self, total):
          '''
          Signal the start of the process.
  
          Parameters
          ----------
          total : int
              The total number of steps in the process, or None if unknown.
          '''
          self.logger.info(json.dumps(['START', self.name, total])f start(self, total):
          '''
          Signal the start of the process.
  
          Parameters
          ----------
          total : int
              The total number of steps in the process, or None if unknown.
          '''
          self.logger.info(json.dumps(['START', self.name, total]))
docs: Signal the start of the process.
  
          Parameters
          ----------
          total : int
              The total number of steps in the process, or None if unknown.