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/*******************************************************************************
*
* Copyright (c) 2025 - 2026 Haixing Hu.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0.
*
******************************************************************************/
//! Traits for code property functionality
//!
/// A trait indicating that an entity class has a code property
///
/// This trait provides access and setting functionality for the code of
/// domain objects, where the code is usually a globally unique identifier.
///
/// # Example
///
/// ```rust
/// use qubit_mixin::WithCode;
///
/// struct Product {
/// code: String,
/// name: String,
/// }
///
/// impl WithCode for Product {
/// fn code(&self) -> &str {
/// &self.code
/// }
///
/// fn set_code(&mut self, code: &str) {
/// self.code = code.to_string();
/// }
/// }
///
/// let mut product = Product {
/// code: "PROD001".to_string(),
/// name: "Widget".to_string(),
/// };
/// assert_eq!(product.code(), "PROD001");
///
/// product.set_code("PROD002");
/// assert_eq!(product.code(), "PROD002");
/// ```
///