This command allows a client to efficiently copy scenes from one group/scene identifier pair to another group/scene identifier pair.
This command can be used to get the used scene identifiers within a certain group, for the endpoint that implements this cluster.
It is not mandatory for an extension field set to be included in the command for every cluster on that endpoint that has a defined extension field set. Extension field sets may be omitted, including the case of no extension field sets at all.