RFR: 8341064: Define anchor point and index term for "wrapper classes" [v3]

[Joe Darcy]

> The is the initial version of a PR to defined an anchor point and index term of "wrapper classes."

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Respond to review feedback.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21215/files
  - new: https://git.openjdk.org/jdk/pull/21215/files/bf53c4c2..d1cf8b75

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21215&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21215&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21215.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21215/head:pull/21215

PR: https://git.openjdk.org/jdk/pull/21215