Godeps/_workspace/src/gopkg.in/mgo.v2/cluster.go
func (cluster *mongoCluster) Acquire() {
	cluster.Lock()
	cluster.references++
	debugf("Cluster %p acquired (refs=%d)", cluster, cluster.references)
	cluster.Unlock()
}
func (cluster *mongoCluster) Acquire() {
	cluster.Lock()
	cluster.references++
	debugf("Cluster %p acquired (refs=%d)", cluster, cluster.references)
	cluster.Unlock()
}
// Acquire increases the reference count for the cluster.