insert fzf selection into vim

[rbusfield]

I have a config file (yml-like) that I edit in vim. One section of the config file takes items from a huge list of items (thousands).
I would like to insert the multi-select list from fzf into the current position in vim.
similar to a :r! cat list.txt | grep -e "foo"

$ cat list.txt
foo
bar
baz

What I have tried:

$ cat ~/.vimrc
call plug#begin('~/.vim/plugged')
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
call plug#end()

$ fzf --version
0.45.0 (tarball)

vi file
:call fzf#run({'source': 'cat list.txt', 'sinklist': 'i'})

Error detected while processing function fzf#run[69]..<SNR>11_callback:
line   23:
Vim(call):E718: Funcref required
Press ENTER or type command to continue

[junegunn]

call fzf#run(fzf#wrap({'options': '--multi', 'source': 'cat list.txt', 'sinklist': { list -> append(line('.'), list) }}))

• It's always a good idea to use wrap the spec with fzf#wrap
• With --multi, you can select multiple items using tab and shift-tab
• Use append function to append the selected lines under the current line (line('.'))