public function __get( $key ) {
		wc_doing_it_wrong( $key, 'Order properties should not be accessed directly.', '3.0' );

		if ( 'completed_date' === $key ) {
			return $this->get_date_completed() ? gmdate( 'Y-m-d H:i:s', $this->get_date_completed()->getOffsetTimestamp() ) : '';
		} elseif ( 'paid_date' === $key ) {
			return $this->get_date_paid() ? gmdate( 'Y-m-d H:i:s', $this->get_date_paid()->getOffsetTimestamp() ) : '';
		} elseif ( 'modified_date' === $key ) {
			return $this->get_date_modified() ? gmdate( 'Y-m-d H:i:s', $this->get_date_modified()->getOffsetTimestamp() ) : '';
		} elseif ( 'order_date' === $key ) {
			return $this->get_date_created() ? gmdate( 'Y-m-d H:i:s', $this->get_date_created()->getOffsetTimestamp() ) : '';
		} elseif ( 'id' === $key ) {
			return $this->get_id();
		} elseif ( 'post' === $key ) {
			return get_post( $this->get_id() );
		} elseif ( 'status' === $key ) {
			return $this->get_status();
		} elseif ( 'post_status' === $key ) {
			return get_post_status( $this->get_id() );
		} elseif ( 'customer_message' === $key || 'customer_note' === $key ) {
			return $this->get_customer_note();
		} elseif ( in_array( $key, array( 'user_id', 'customer_user' ) ) ) {
			return $this->get_customer_id();
		} elseif ( 'tax_display_cart' === $key ) {
			return get_option( 'woocommerce_tax_display_cart' );
		} elseif ( 'display_totals_ex_tax' === $key ) {
			return 'excl' === get_option( 'woocommerce_tax_display_cart' );
		} elseif ( 'display_cart_ex_tax' === $key ) {
			return 'excl' === get_option( 'woocommerce_tax_display_cart' );
		} elseif ( 'cart_discount' === $key ) {
			return $this->get_total_discount();
		} elseif ( 'cart_discount_tax' === $key ) {
			return $this->get_discount_tax();
		} elseif ( 'order_tax' === $key ) {
			return $this->get_cart_tax();
		} elseif ( 'order_shipping_tax' === $key ) {
			return $this->get_shipping_tax();
		} elseif ( 'order_shipping' === $key ) {
			return $this->get_shipping_total();
		} elseif ( 'order_total' === $key ) {
			return $this->get_total();
		} elseif ( 'order_type' === $key ) {
			return $this->get_type();
		} elseif ( 'order_currency' === $key ) {
			return $this->get_currency();
		} elseif ( 'order_version' === $key ) {
			return $this->get_version();
	 	} elseif ( is_callable( array( $this, "get_{$key}" ) ) ) {
			return $this->{"get_{$key}"}();
		} else {
			return get_post_meta( $this->get_id(), '_' . $key, true );
		}
	}