code: def wait_for_healthy(
          raiden: 'RaidenService',
          node_address: Address,
          retry_timeout: float,
  ) -> None:
      
      network_statuses = views.get_networkstatuses(
          views.state_from_raiden(raiden),
      )
  
      while network_statuses.get(node_address) != NODE_NETWORK_REACHABLE:
          gevent.sleep(retry_timeout)
          network_statuses = views.get_networkstatuses(
              views.state_from_raiden(raiden),
          )
docs: Wait until `node_address` becomes healthy.
  
      Note:
          This does not time out, use gevent.Timeout.