---Yields the current thread until a non-nil value is returned by the function. ---@generic T ---@param cb fun(): T? ---@param errMessage string? ---@param timeout number? Error out after `~x` ms. Defaults to 1000, unless set to `false`. ---@return T? ---@async function lib.waitFor(cb, errMessage, timeout) local value = cb() if value ~= nil then return value end if timeout or timeout == nil then if type(timeout) ~= 'number' then timeout = 1000 end if IsDuplicityVersion() then timeout /= 50; else timeout -= GetFrameTime() * 1000; end end local start = GetGameTimer() local i = 0 while value == nil do if timeout then i += 1 if i > timeout then return error(('%s (waited %.1fms)'):format(errMessage or 'failed to resolve callback', (GetGameTimer() - start) / 1000), 2) end end Wait(0) value = cb() end return value end return lib.waitFor