This PR proposes to Add @sealedGraph to `Thread.Builder`. -------------
Commit messages: - Add @sealedGraph to Thread.Builder Changes: https://git.openjdk.org/jdk/pull/16138/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16138&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8317870 Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/16138.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16138/head:pull/16138 PR: https://git.openjdk.org/jdk/pull/16138
