How to emulate mouse via V-USB library?

Question

Arduino

I will rephrase the question already asked earlier: How to set up v-usb on arduino nano?
There is an arduino nano and I want to emulate a mouse and keyboard from it.
The scheme is taken from here: blog.petrockblock.com/2012/05/19/usb-keyboard-with... The
example from the article works, then according to this article ( rukodelie-ds. ru/forum/viewtopic.php?t=804 ) the library itself was slightly changed, at least the file that is responsible for recognizing the device, now the computer recognizes it as a composite hid-usb
The question is: how to emulate mouse signals, or where is there a suitable library?
UPD
Sitting on a long and boring pair, I got this https://github.com/tinyusbboard/hid-KeyboardMouse
How will I be able to test
it
?