[code-reflection] Integrated: Use SequencedSet

[Paul Sandoz]

On Mon, 12 Jan 2026 22:40:22 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

> Use `SequencedSet`, ensuring easier access to a first element.

This pull request has now been integrated.

Changeset: ff7e027b
Author:    Paul Sandoz <psandoz at openjdk.org>
URL:       https://git.openjdk.org/babylon/commit/ff7e027bcfc3fd11e30609ed3cf606176e4bae73
Stats:     26 lines in 3 files changed: 3 ins; 5 del; 18 mod

Use SequencedSet

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PR: https://git.openjdk.org/babylon/pull/834