RFR: 8266571: Sequenced Collections [v9]

[Stuart Marks]

> PR for Sequenced Collections implementation.

Stuart Marks has updated the pull request incrementally with one additional commit since the last revision:

  Delegate more methods in the views of ReverseOrderSortedMapView.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/7387/files
  - new: https://git.openjdk.org/jdk/pull/7387/files/79747247..b59f8dda

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=7387&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=7387&range=07-08

  Stats: 9 lines in 1 file changed: 9 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/7387.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/7387/head:pull/7387

PR: https://git.openjdk.org/jdk/pull/7387