public function init_form_fields() {
		parent::init_form_fields();
		$this->form_fields['availability'] = array(
			'title'       => __( 'Availability', 'woocommerce' ),
			'type'        => 'select',
			'class'       => 'wc-enhanced-select',
			'description' => '',
			'default'     => 'including',
			'options'     => array(
				'including' => __( 'Selected countries', 'woocommerce' ),
				'excluding' => __( 'Excluding selected countries', 'woocommerce' ),
			),
		);
	}