Add helper to read entity

[Shatur]

Better encapsulates the unsafe code.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.98%. Comparing base (d1491ac) to head (ad73676). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #354 +/- ## ========================================== + Coverage 89.96% 89.98% +0.02% ========================================== Files 41 41 Lines 2362 2367 +5 ========================================== + Hits 2125 2130 +5 Misses 237 237 ```

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