This change overrides mutator methods in the implementation returned by `Map.of().entrySet()` to throw `UnsupportedOperationException`.
------------- Commit messages: - Use AbstractImmutableSet - Throw UOE for all Map.of().entrySet() mutator methods - 8328821: Make the ImmutableCollections clear() call consistent Changes: https://git.openjdk.org/jdk/pull/18522/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18522&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8328821 Stats: 36 lines in 2 files changed: 35 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/18522.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18522/head:pull/18522 PR: https://git.openjdk.org/jdk/pull/18522
