Description

If we generate tests for the class with hidden fields, generated model is incorrect, because for engine all fields with the same name in one class are the same.

To Reproduce

Launch HiddenFieldExampleTest or HiddenFieldAccessModifiersTest.

Expected behavior

Tests passed.

Actual behavior

Tests doesn't work because generated model is incorrect.

Additional context

This is a sub-issue for #563, look there for more information and examples.