// =============================================================================
// Copyright (c) 2025 - 2026 Haixing Hu.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0.
// =============================================================================
//! Source expressions used to build one serialized field carrier.
use TokenStream;
/// Source expressions used by one serialized field carrier.
pub