zmk_mf68/app/tests/hold-tap/balanced/behavior_keymap.dtsi

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

/ {
	behaviors {
		ht_bal: behavior_hold_tap_balanced {
			compatible = "zmk,behavior-hold-tap";
			label = "HOLD_TAP_BALANCED";
			#binding-cells = <2>;
			flavor = "balanced";
			tapping_term_ms = <300>;
			bindings = <&kp>, <&kp>;
		};
	};

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

		default_layer {
			bindings = <
				&ht_bal LEFT_SHIFT F &ht_bal LEFT_CONTROL J
				&kp D &kp RIGHT_CONTROL>;
		};
	};
};