If present, the DebugName of the merged handle will concatenate DebugName of all merged handles, otherwise it will be set to DebugName argument.
RedirectParents
If present, existing parent handles will be redirected to point to the merged handle, otherwise they will continue pointing to the child handles directly.
SkipNulls
If present, nullptr handles are ignored (and will not be present in the merged handle), otherwise merged handle creation will fail when nullptr handles are present.
