Where can I override plugin api functions?

[A7R7]

Here is my situation:
I want to override a function in LuaSnip, a code snippet plugin.
This is what I do

{
    "L3MON4D3/LuaSnip",
    ...
    config = function()
	local snip_expand = require("luasnip").snip_expand
	require("luasnip").snip_expand = function(...)
		vim.o.ul = vim.o.ul
		snip_expand(...)
	end
    end,
   ...
}

however, this does not take effect. If I directly edit the plugin's source code, it can work.
So I wonder what's the best way to override plugin apis.
ps: this plugin is lazy loaded

[yutkat]

This is a Lua discussion, not a lazy.nvim discussion.

So I think it is appropriate for you to do it in Neovim Discourse.
https://neovim.discourse.group

[yutkat]

I'm not sure what's going on with your situation, but it seems to work normally if you overwrite it with the following function. "aaa" is properly displayed when trying to expand the snippet.

require("luasnip").snip_expand = function(...)
	print("aaa")
end

Maybe it's a problem in your LuaSnip usage?

[A7R7]

Thank you for your trying to explore the situation !
I also tried to overwrite the function like this, but there's no output of "aaa", instead it works the default way.
So I guess this function failed to overwrite in my situation.
Did you write this function inside the config function?
Meanwhile, I also added a few other configs in the config function,

config = function(_, opts)
	require("luasnip").setup(opts)
	require("luasnip.loaders.from_lua").lazy_load({ paths = "~/.config/nvim/luaSnip/" })
	require("luasnip").snip_expand = function(...)
		print("aaa")
	end
end,

but only require("luasnip").setup(opts) works.
So I guess I may put it in the wrong place, or in a wrong way.

[yutkat]

If you are calling a snippet of LuaSnip (not a snippet of LSP), you can see "aaa". I recommend you review the snippet settings and file paths.

[yutkat]

@A7R7 Have you solved this?

[A7R7]

Sorry for a late reply. Actually, no, the snippet auto expanded without printing "aaa". But I latter found that this config is not a good practice, so I gave up setting this config.