code: def to_dict(self):
          
          # evaluate checks
          checks = {
              key: HealthResult.evaluate(func, self.graph)
              for key, func in self.checks.items()
          }
          dct = dict(
              # return the service name helps for routing debugging
              name=self.name,
              ok=all(checks.values()),
          )
          if checks:
              dct["checks"] = {
                  key: checks[key].to_dict()
                  for key in sorted(checks.keys())
              }
          return dct
docs: Encode the name, the status of all checks, and the current overall status.