The plugin unbound in CoreDNS does not support forward-zone option?

[dwbxm]

Hi, I have a need, let unbound plugin forward to the upstream DNS server. For example,

. {
unbound {
#option forward-zone [name:.,forward-addr:8.8.8.8]
#option forward-zone "8.8.8.8"
option forward-addr "8.8.8.8"
#option forward-zone www.baidu.com
}
cache 300
#reload 6s
log
errors
}

CoreDNS'log echo :
plugin/unbound: failed to set option "forward-addr:" with value "8.8.8.8": syntax error

Does not the plugin unbound support the option forward-zone?

Thanks
dwbxm