code: def start(self):
          ''' Start the Bokeh Server application.
  
          Starting the Bokeh Server Tornado application will run periodic
          callbacks for stats logging, cleanup, pinging, etc. Additionally, any
          startup hooks defined by the configured Bokeh applications will be run.
  
          '''
          self._stats_job.start()
          if self._mem_job is not None:
              self._mem_job.start()
          self._cleanup_job.start()
          if self._ping_job is not None:
              self._ping_job.start()
  
          for context in self._applications.values():
              context.run_load_hook(f start(self):
          ''' Start the Bokeh Server application.
  
          Starting the Bokeh Server Tornado application will run periodic
          callbacks for stats logging, cleanup, pinging, etc. Additionally, any
          startup hooks defined by the configured Bokeh applications will be run.
  
          '''
          self._stats_job.start()
          if self._mem_job is not None:
              self._mem_job.start()
          self._cleanup_job.start()
          if self._ping_job is not None:
              self._ping_job.start()
  
          for context in self._applications.values():
              context.run_load_hook()
docs: Start the Bokeh Server application.
  
          Starting the Bokeh Server Tornado application will run periodic
          callbacks for stats logging, cleanup, pinging, etc. Additionally, any
          startup hooks defined by the configured Bokeh applications will be run.