Exploratory work in support of https://github.com/openjdk/jdk/pull/18509.
------------- Commit messages: - Add more support for component local variables. - Add uses of new visitor types. - JDK-8329556: javax.lang.model suppor for Derived Record Creation (Preview) - Baseline on 04 version of the webrev. Changes: https://git.openjdk.org/jdk/pull/18590/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18590&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8329556 Stats: 1640 lines in 49 files changed: 1550 ins; 20 del; 70 mod Patch: https://git.openjdk.org/jdk/pull/18590.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18590/head:pull/18590 PR: https://git.openjdk.org/jdk/pull/18590
