RFR: 8318903: [lw5] null-restricted storage API points

[Vicente Romero]

internal null-restricted storage API points

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Commit messages:
 - 8318903: [lw5] null-restricted storage API points

Changes: https://git.openjdk.org/valhalla/pull/942/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=942&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318903
  Stats: 157 lines in 4 files changed: 157 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/942.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/942/head:pull/942

PR: https://git.openjdk.org/valhalla/pull/942