/usr/share/fish/completions/funced.fish is in fish-common 2.4.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | complete -c funced -xa "(functions -na)" --description "Save function"
complete -c funced -s e -l editor -d 'Open function in external editor' -xa '(__fish_complete_command)'
complete -c funced -s i -l interactive -d 'Edit in interactive mode'
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