RFR: 8324636: Serial: Remove Generation::block_is_obj [v2]

[Stefan Karlsson]

On Thu, 25 Jan 2024 12:09:50 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Trivial moving a method from `Generation` to subclass.
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Marked as reviewed by stefank (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17555#pullrequestreview-1843602566