IsTransientAPIError returns true if error from Google API client indicates an error that can go away on its own in the future.

KVListFromMap converts a map to KVList.

UnpackKVList takes validated list of k-v pair strings and returns list of structs.

ValidateKVList makes sure each string in the list is valid key-value pair.

WrapAPIError wraps error from Google API client in transient wrapper if necessary.

KV is key and value strings.

KVList if list of KV pairs.