Cannot add static ARP entry to VRF (or apply to interface)

Bugs
1

I need to configure static ARP entry to VRF, but now there is no such config options.
I solved this problem applying it to interface placed to my VRF using shell:

#arp -i eth1.20 -s 198.18.0.1 00:00:05:5E:01:0a

Is it possible to add element “interface” to configuration of static ARP?

Something like this:

set protocols static arp 198.18.0.1 hwaddr 00:00:05:5E:01:0a interface eth1.20

My Version: VyOS 1.3-rolling-202010300217