code: def check(self, func=None, name=None):
          
          if func is None:
              return functools.partial(self.check, name=name)
  
          if name is None:
              name = func.__name__
  
          self.logger.info('Registered Dockerflow check %s', name)
  
          @functools.wraps(func)
          def decorated_function(*args, **kwargs):
              self.logger.info('Called Dockerflow check %s', name)
              return func(*args, **kwargs)
  
          self.checks[name] = decorated_function
          return decorated_function
docs: A decorator to register a new Dockerflow check to be run
          when the /__heartbeat__ endpoint is called., e.g.::
  
              from dockerflow.flask import checks
  
              @dockerflow.check
              def storage_reachable():
                  try:
                      acme.storage.ping()
                  except SlowConnectionException as exc:
                      return [checks.Warning(exc.msg, id='acme.health.0002')]
                  except StorageException as exc:
                      return [checks.Error(exc.msg, id='acme.health.0001')]
  
          or using a custom name::
  
              @dockerflow.check(name='acme-storage-check)
              def storage_reachable():
                  # ...