// AddNode adds a Seesaw Node to a Seesaw Cluster.
func (c *Cluster) AddNode(node *seesaw.Node) error {
key := node.Key()
if _, ok := c.Nodes[key]; ok {
return fmt.Errorf("Cluster %q already contains Node %q", c.Site, key)
}
c.Nodes[key] = node
return nil
}
