moduleapi: Add luacheck annotation to suppress warning about unused self This is a convenience function, and there is currently no module-specific code required to implement it. Not using 'self' is to be expected.

local xpcall = xpcall;

if select(2, xpcall(function (x) return x end, function () end,  "test")) ~= "test" then
	xpcall = require"prosody.util.compat".xpcall;
end

return {
	xpcall = xpcall;
};