code: func (e *Enodes) Set(index int, enode *Enode) error {
  	if index < 0 || index >= len(e.nodes) {
  		return errors.New("index out of bounds")
  	}
  	e.nodes[index] = enode.node
  	return nil
  }
docs: // Set sets the enode at the given index in the slice.