feat: Add access delegate method in Component

[TatuLund]

fixes #20104

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Test Results

1 139 files  ± 0  1 139 suites  ±0   1h 9m 4s ⏱️ - 1m 8s
7 408 tests ± 0  7 356 ✅  -  1  50 💤 ±0  0 ❌ ±0  2 🔥 +1 
7 772 runs  +21  7 710 ✅ +18  60 💤 +2  0 ❌ ±0  2 🔥 +1 

For more details on these errors, see this check.

Results for commit 9fff3cc. ± Comparison against base commit abc0122.

[mvysny]

Please make uiRef volatile, otherwise background thread may not see the most up-to-date value. Also, in javadoc, please mark the accessUI function as thread-safe (safe to be called from background threads), to give a clear indication to users

[Legioth]

Denied based on fundamental reasons from an internal discussion. In short: thread safety is questionable, it encourages bad habits, it increases memory consumption universally for something that can be solved in other ways.