Error during asking to generate tests for line, which outside the class

[arksap2002]

Describe the bug
Error during asking to generate tests for the external line.

java.lang.NullPointerException
	at org.jetbrains.research.testspark.java.JavaPsiHelper.collectClassesToTest(JavaPsiHelper.kt:93)
	at org.jetbrains.research.testspark.tools.llm.generation.PromptManager._get_classesToTest_$lambda$0(PromptManager.kt:51)
	at com.intellij.openapi.application.impl.RwLockHolder.runReadAction(RwLockHolder.kt:271)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:845)
	at org.jetbrains.research.testspark.tools.llm.generation.PromptManager.getClassesToTest(PromptManager.kt:48)
	at org.jetbrains.research.testspark.tools.llm.generation.PromptManager.<init>(PromptManager.kt:60)
	at org.jetbrains.research.testspark.tools.llm.Llm.generateTestsForLine(Llm.kt:192)
	at org.jetbrains.research.testspark.actions.TestSparkAction$TestSparkActionWindow.startUnitTestGenerationTool(TestSparkAction.kt:366)
	at org.jetbrains.research.testspark.actions.TestSparkAction$TestSparkActionWindow.startLLMGeneration(TestSparkAction.kt:387)
	at org.jetbrains.research.testspark.actions.TestSparkAction$TestSparkActionWindow.addListeners$lambda$9(TestSparkAction.kt:330)
	at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1972)
	at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2313)
	at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
	at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
	at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6657)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3385)
	at java.desktop/java.awt.Component.processEvent(Component.java:6422)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5027)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4855)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4969)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4583)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4524)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2809)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4855)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:794)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:739)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:733)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:766)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:764)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:763)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:698)
	at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.kt:637)
	at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$10(IdeEventQueue.kt:584)
	at com.intellij.openapi.application.impl.RwLockHolder.runWithEnabledImplicitRead(RwLockHolder.kt:138)
	at com.intellij.openapi.application.impl.RwLockHolder.runWithImplicitRead(RwLockHolder.kt:129)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:584)
	at com.intellij.ide.IdeEventQueue.access$_dispatchEvent(IdeEventQueue.kt:77)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:362)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:361)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:843)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:361)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:356)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1021)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:114)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1021)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:356)
	at com.intellij.openapi.application.impl.RwLockHolder.runIntendedWriteActionOnCurrentThread(RwLockHolder.kt:209)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:830)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:398)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)

To Reproduce
Steps to reproduce the behavior:

1. Generate tests for package line'
2. See error

Expected behavior
It better to disable to generate tests for lines outside the classes for Java.

[arksap2002]

The same issues for Kotlin. Check all code to test types.