zmk_mf68/app/tests/sticky-keys/9-sk-dn-up-dn-up/native_posix_64.keymap

#include <dt-bindings/zmk/keys.h>
#include <behaviors.dtsi>
#include <dt-bindings/zmk/kscan_mock.h>

/ {
	keymap {
		compatible = "zmk,keymap";
		label ="Default keymap";

		default_layer {
			bindings = <
				&sk LEFT_SHIFT &none
				&none &none
			>;
		};
	};
};

&kscan {
	events = <
		ZMK_MOCK_PRESS(0,0,10) 
		ZMK_MOCK_RELEASE(0,0,10) 
		/* the sticky key is pressed again, so the previous one must be cancelled */
		ZMK_MOCK_PRESS(0,0,10) 
		ZMK_MOCK_RELEASE(0,0,1200)
	>;
};