public function set_tax_status( $status ) {
		$options = array(
			'taxable',
			'shipping',
			'none',
		);

		// Set default if empty.
		if ( empty( $status ) ) {
			$status = 'taxable';
		}

		if ( ! in_array( $status, $options, true ) ) {
			$this->error( 'product_invalid_tax_status', __( 'Invalid product tax status.', 'woocommerce' ) );
		}

		$this->set_prop( 'tax_status', $status );
	}