zmk_mf68/app/tests/key-repeat/behavior_keymap.dtsi

#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 = <
			&key_repeat &kp A
			&kp LCTRL &kp C_VOL_UP
			>;
		};
	};
};