[record_use] Store multiple loading units

[dcharkes]

JSON implementation for:

• [record_use] Implementation: JSON: Use loading unit should be a list #3022

[github-actions]

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Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
record_use	Breaking	0.4.2	0.5.0-wip	0.5.0-wip	✔️

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// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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pkgs/jni/test/debug_release_test.dart
pkgs/objective_c/example/command_line/lib/main.dart
pkgs/objective_c/lib/src/ns_input_stream.dart

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PR Health

Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
record_use	Breaking	0.4.2	0.5.0-wip	0.5.0-wip	✔️

This check can be disabled by tagging the PR with skip-breaking-check.

License Headers ✔️

// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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pkgs/jni/test/debug_release_test.dart
pkgs/objective_c/example/command_line/lib/main.dart
pkgs/objective_c/lib/src/ns_input_stream.dart

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[goderbauer]

For my own understanding (here and elsewhere): Why's it always the first index?

[dcharkes]

See follow up PR. I wanted to split the JSON update from the Dart API update. The Dart API becomes a list in the next PR.

[goderbauer]

LGTM