for secret, clusters := range c.remoteClusters {
		out[secret] = make(map[cluster.ID]*Cluster, len(clusters))
		for cid, c := range clusters {
			outCluster := *c
			out[secret][cid] = &outCluster
		}
	}
	return out
}

// GetExistingClustersFor return existing clusters registered for the given secret
func (c *ClusterStore) GetExistingClustersFor(secretKey string) []*Cluster {