zmk_mf68/app/dts/behaviors/toggle_layer.dtsi

/*
 * Copyright (c) 2020 Cody McGinnis <brainwart@gmail.com>
 *
 * SPDX-License-Identifier: MIT
 */
 
 / {
	behaviors {
		tog: behavior_toggle_layer {
			compatible = "zmk,behavior-toggle-layer";
			label = "TOGGLE_LAYER";
			#binding-cells = <1>;
		};
	};
};