Unused-function diagnostic with callback functions

[rolandlo]

Using Lua for a Xournal++ plugin, I must define various callback functions whose names are passed to the C side (and are called from the C side when the user of the plugin activates the callback) and are never called from Lua. This diagnoses these callback functions with unused-function and results in the function code becoming more transparent. That is not what I want. Is there a way to avoid that diagnostic for those callback functoins?

Example code:

app.registerUi({ menu = "Menu name", callback = "cb" })

-- and later

local function cb()
-- some code
end

[rolandlo]

Nevermind, the callback functions should be global in my case.