RFR: [bworld-apis] Adding more bangs to collections [v6]

[Vicente Romero]

> adding more bangs to collection apis

Vicente Romero has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 16 commits:

 - Merge branch 'bworld-apis' into adding.more.bangs.to.collections
 - removing manual NPE checks
 - removing manual check
 - automatically removing invocations to Objects.requireNonNull
 - Apply suggestion from @vicente-romero-oracle
 - removing invocations to Objects.requireNonNull
 - removing hack
 - continuation apis
 - another part of the hack
 - api changes continuation
 - ... and 6 more: https://git.openjdk.org/valhalla/compare/85cffce7...b35388a1

-------------

Changes: https://git.openjdk.org/valhalla/pull/2112/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2112&range=05
  Stats: 516 lines in 67 files changed: 7 ins; 59 del; 450 mod
  Patch: https://git.openjdk.org/valhalla/pull/2112.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2112/head:pull/2112

PR: https://git.openjdk.org/valhalla/pull/2112