Как добавить чекбокс к атрибуту в woocommerce?

// Manage options hooks
		add_action( 'woocommerce_product_options_inventory_product_data', 'my_woocommerce_product_options_inventory_product_data' );
		add_action( 'woocommerce_process_product_meta', 'my_woocommerce_process_product_meta' );


	/**
	 * Hook handler for woocommerce_product_options_inventory_product_data.
	 *
	 * Echo html code for our options on inventory_product_data option tab
	 * 
	 * @since    1.0.0
	 */
	public function my_woocommerce_product_options_inventory_product_data() {
		global $product, $post;

		$chk_val = get_post_meta ( $post->ID , 'hdke_stock_tracker_checkbox'  , true );
		$thld_val = get_post_meta ( $post->ID , 'hdke_stock_tracker_threshold'  , true );

		echo '<div class="options_group">'; // Группировка полей 

			woocommerce_wp_checkbox( array(
				'id'            	=> '_hdke_stock_tracker_checkbox',
				'name'				=> 'hdke_stock_tracker_checkbox',
				'wrapper_class' 	=> 'show_if_simple show_if_variable',
				'label'         	=> __( 'Stock tracker', $this->plugin_name ),
				'description'       => __( 'Enabled stock tracking for this product', $this->plugin_name ),
				'cbvalue'			=> $chk_val ? $chk_val : 'no',
				'value'				=> $chk_val ? $chk_val : 'no'
			) );

			woocommerce_wp_text_input( array(
				'id'                => '_hdke_stock_tracker_threshold',
				'name'				=> 'hdke_stock_tracker_threshold',
				'label'             => __( 'Stock threshold', $this->plugin_name ),
				'description'       => __( 'Input min threshold of stock variation to include this product in dk b2b order list.', $this->plugin_name ),
				'style'         	=> 'width: 100px;',
				'wrapper_class' 	=> 'show_if_simple show_if_variable',
				'desc_tip'      	=> 'true',
				'type'              => 'number',
				'custom_attributes' => array('step' => 'any', 'min'  => '0', 	),
				'value' 			=> $thld_val ? $thld_val : 0
			) );

		echo '</div>';		

	}

	/**
	 * Hook handler for woocommerce_process_product_meta.
	 *
	 * Save user settings of our options
	 * 
	 * @since    1.0.0
	 */
	public function my_woocommerce_process_product_meta() {
		global $product, $post;

		$chk_val = isset($_POST['hdke_stock_tracker_checkbox']) ? 'yes' : 'no';
		$thld_val = empty($_POST['hdke_stock_tracker_threshold']) ? '0' : $_POST['hdke_stock_tracker_threshold'];

		update_post_meta( $post->ID, 'hdke_stock_tracker_checkbox', $chk_val );
		update_post_meta( $post->ID, 'hdke_stock_tracker_threshold', $thld_val );
	}