code: func parseTrustedNodes(trustedNodes []string) map[enode.ID]*enode.Node {
  	nodes := make(map[enode.ID]*enode.Node)
  
  	for _, node := range trustedNodes {
  		node, err := enode.ParseV4(node)
  		if err != nil {
  			log.Warn("Trusted node URL invalid", "enode", node, "err", err)
  			continue
  		}
  		nodes[node.ID()] = node
  	}
  	return nodes
  }
docs: // parseTrustedNodes returns valid and parsed enodes