'Failed to compile test class CtAssignmentImplTest' on `spoon-core-7.0.0`

[tyuldashev]

Description
UTBot generates uncompilable tests for spoon CtAssignmentImplTest class.

To Reproduce

Steps to reproduce the behavior:

1. Open utbot project
2. Open org.utbot.contest.ContestEstimatorKt file
3. Set filters on project and class:

        methodFilter = "spoon.support.reflect.code.CtAssignmentImpl.*"
        projectFilter = listOf("spoon-core-7.0.0")

4. Increase timeout if tests are not generated (val timeLimit = 300)
5. Run ContestEstimator

Expected behavior
Tests are generated without errors

Actual behavior
There are errors in console output

17:36:14.329 | INFO  | Started: Compiling class C:\Users\t00814305\IdeaProjects\UTBotJava\utbot-junit-contest\build\output\test_candidates\spoon-core-7.0.0\spoon\support\reflect\code\CtAssignmentImplTest.java
17:36:14.331 | DEBUG | Compile attempt 1
17:36:18.248 | ERROR | Compilation errors: C:\Users\t00814305\IdeaProjects\UTBotJava\utbot-junit-contest\build\output\test_candidates\spoon-core-7.0.0\spoon\support\reflect\code\CtAssignmentImplTest.java:2149: error: typeCasts is not public in CtExpressionImpl; cannot be accessed from outside package
        List actualTypeCasts = actual.typeCasts;
                                     ^
C:\Users\t00814305\IdeaProjects\UTBotJava\utbot-junit-contest\build\output\test_candidates\spoon-core-7.0.0\spoon\support\reflect\code\CtAssignmentImplTest.java:2192: error: typeCasts is not public in CtExpressionImpl; cannot be accessed from outside package
        List actualTypeCasts = actual.typeCasts;
                                     ^
Note: C:\Users\t00814305\IdeaProjects\UTBotJava\utbot-junit-contest\build\output\test_candidates\spoon-core-7.0.0\spoon\support\reflect\code\CtAssignmentImplTest.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
2 errors

[tyuldashev]

Attaching generated class... CtAssignmentImplTest.txt