code: func GetRemoteIdentifier(o dhcp6.Options) (*RemoteIdentifier, error) {
  	v, err := o.GetOne(dhcp6.OptionRemoteIdentifier)
  	if err != nil {
  		return nil, err
  	}
  
  	r := new(RemoteIdentifier)
  	err = r.UnmarshalBinary(v)
  	return r, err
  }
docs: // GetRemoteIdentifier returns the Remote Identifier, described in RFC 4649.
  //
  // This option may be added by DHCPv6 relay agents that terminate
  // switched or permanent circuits and have mechanisms to identify the
  // remote host end of the circuit.