Gitaly Cluster with Helm Charts: What is "internal.names"?

I’m trying to get an HA Gitaly cluster running within Kubernetes using the Helm chart, but the documentation on it seems very lacking. This is pretty much all I see:

internal.names[]	- default	Ordered names of statfulset storages

I’m trying to better understand exactly what it means by statefulset storages. I thought it’d reference the DNS-routable hostnames of each pod within the stateful set, but that’s a bit of a chicken-and-egg since you don’t necessarily know those until after the cluster is up and running.

Any insight/clarification/pointers to getting it configured would be greatly appreciated.