Order Aggregate

Order aggregate with OrderLine items, ChargeLine discounts/fees, and event-driven lifecycle (Open->Paid->Completed/Canceled).

// Source: https://github.com/st-tu-dresden/salespoint | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
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/*
 * Copyright 2017-2023 the original author or authors.
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 * Licensed under the Apache License, Version 2.0 (the "License");
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