Switching method return type for a method will cause plugin to throw an exception

[TheAmg]

Describe the bug

On trying to change the return type of a method the following exception is thrown from a balloon notification.
This was observed on changing a Boolean return type method to List without changing the name or body of the method.

Reproduction steps

1. When IDE is indexed and plugin is installed create a new method that returns a Boolean. (No need to run project)
2. Change the return type from Boolean to List (type)
3. The Exception should popup when as you are typing "<" or "B" right after adding "<".
   ...

Expected behavior

No Exceptions to popup on method signature change.

Additional context

Stack trace -

java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
	at com.insidious.plugin.util.ClassTypeUtils.getDottedToDescriptorName(ClassTypeUtils.java:195)
	at com.insidious.plugin.util.ClassTypeUtils.getDottedToDescriptorName(ClassTypeUtils.java:846)
	at com.insidious.plugin.pojo.atomic.MethodUnderTest.buildMethodSignature(MethodUnderTest.java:88)
	at com.insidious.plugin.pojo.atomic.MethodUnderTest.fromPsiCallExpression(MethodUnderTest.java:162)
	at com.insidious.plugin.inlay.InsidiousInlayHintsCollector.collect(InsidiousInlayHintsCollector.java:197)
	at com.intellij.codeInsight.hints.CollectorWithSettings.collectHints(InlayHintsUtils.kt:91)
	at com.intellij.codeInsight.hints.InlayHintsPass.doCollectInformation$lambda$0(InlayHintsPass.kt:46)
	at com.intellij.concurrency.ApplierCompleter.execAndForkSubTasks(ApplierCompleter.java:142)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1133)
	at com.intellij.concurrency.ApplierCompleter.lambda$wrapInReadActionAndIndicator$1(ApplierCompleter.java:98)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$13(CoreProgressManager.java:604)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:679)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:635)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:603)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:61)
	at com.intellij.concurrency.ApplierCompleter.wrapInReadActionAndIndicator(ApplierCompleter.java:110)
	at com.intellij.concurrency.ApplierCompleter.compute(ApplierCompleter.java:91)
	at java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:754)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)