How to create Surfingkeys specific settings in the vimrc file for neovim?

[xbot]

I have successfully set neovim up to edit input fields. Then I want to create some configurations specific to Surfingkeys, but I cannot find any global variables identifying the neovim instance is run by Surfingkeys.

For firenvim, there is a global variable :started_by_firenvim just for this purpose.

[brookhong]

Use exists("*SurfingkeysNotify").

[xbot]

I've put the following lines in my vimrc file, but it didn' t work:

        if exists('g:started_by_firenvim') || exists('*SurfingkeysNotify')
            set guifont=CaskaydiaCove\ Nerd\ Font:h16
        endif

Maybe this variable had not been initiated when the nvim server was started.