[foreign-memaccess+abi] Integrated: Split Stream operations, fix final and class properties

[Per Minborg]

On Mon, 19 Sep 2022 12:20:41 GMT, Per Minborg <duke at openjdk.org> wrote:

> This PR splits Stream operations into separate lines, and fixes some `final` and class issues.
> 
> Some smaller issues are also fixed not related to the above.

This pull request has now been integrated.

Changeset: 45531333
Author:    Per Minborg <pminborg at gmail.com>
Committer: Maurizio Cimadamore <mcimadamore at openjdk.org>
URL:       https://git.openjdk.org/panama-foreign/commit/455313339811e9aaa94ec2808007d9eb98e7f8e7
Stats:     156 lines in 12 files changed: 35 ins; 66 del; 55 mod

Split Stream operations, fix final and class properties

Reviewed-by: mcimadamore

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PR: https://git.openjdk.org/panama-foreign/pull/724