DHCPv6 custom parameters?

The DHCPv4 implementation provides "global-parameters" and "shared-network-parameters" options, making it possible to manually specify options that aren't exposed through options in the CLI, for example to enable DHCP hostname update:

 dhcp-server {
     disabled false
     dynamic-dns-update {
         enable true
     }
     global-parameters "option domain-name "my-domain-name.com";"
     global-parameters "ddns-updates on;"
     global-parameters "ignore client-updates;"
     global-parameters "update-static-leases on;"
     global-parameters "zone my-domain-name.com. { primary 10.0.2.32; }"
     global-parameters "zone 2.0.10.in-addr.arpa. { primary 10.0.2.32; }"
     ...
}

However there doesn't appear to be an equivalent for dhcpv6-server, even though (as far as I can tell) dnsmasq supports this. 

It would be great if global/shared network parameters could be added to the dhcpv6-server options in a future release. I'd be happy to help beta test if needed