[babylon-docs:master] Integrated: Update code model article.

[Paul Sandoz]

Update the code model API to be in sync.

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

Commit messages:
 - Update code snippet
 - Update code model article.

Changes: https://git.openjdk.org/babylon-docs/pull/10/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon-docs&pr=10&range=00
  Stats: 333 lines in 1 file changed: 33 ins; 9 del; 291 mod
  Patch: https://git.openjdk.org/babylon-docs/pull/10.diff
  Fetch: git fetch https://git.openjdk.org/babylon-docs.git pull/10/head:pull/10

PR: https://git.openjdk.org/babylon-docs/pull/10