as the name indicates, this method works only on element ids with index at the end.

* * Returns a map of: kvServerNode -> vBuckets that it is responsible for */.

get first seen xattr seqno for each vbucket in pipeline.

checks if target cluster supports SANs in certificates.

check if the specified state indicates that the pipeline is still running many components, e.g., topology change detector, use this to decide if they need to abort operation.