code: func (c *Client) MoveServersToServerGroup(src string, dst string, serverIds []string) (*ServerGroup, error) {
  	group := new(ServerGroup)
  	opts := serverGroupMemberOptions{Destination: dst}
  	for _, id := range serverIds {
  		opts.Servers = append(opts.Servers, serverGroupMember{Server: id})
  	}
  	_, err := c.MakeApiRequest("POST", "/1.0/server_groups/"+src+"/move_servers", opts, &group)
  	if err != nil {
  		return nil, err
  	}
  	return group, nil
  }
docs: // MoveServersToServerGroup atomically moves servers from one group to another.
  //
  // The src parameter specifies the group to which the servers currently belong
  //
  // The dst parameter specifies the group to which you want to move the servers.
  //
  // The serverIds parameter specifies the identifiers of the servers you want to move.