code: func (api *PublicAdminAPI) NodeInfo() (*p2p.NodeInfo, error) {
  	server := api.node.Server()
  	if server == nil {
  		return nil, ErrNodeStopped
  	}
  	return server.NodeInfo(), nil
  }
docs: // NodeInfo retrieves all the information we know about the host node at the
  // protocol granularity.