```Exception in thread "main" java.util.concurrent...
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Exception in thread "main" java.util.concurrent.CompletionException: kotlin.KotlinNullPointerException
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1592)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: kotlin.KotlinNullPointerException
	at org.jetbrains.kotlin.psi.KtPsiFactory.createModifier(KtPsiFactory.kt:317)
	at org.jetbrains.kotlin.psi.addRemoveModifier.AddRemoveModifierKt.addModifier(addRemoveModifier.kt:72)
	at org.jetbrains.kotlin.psi.addRemoveModifier.AddRemoveModifierKt.addModifier(addRemoveModifier.kt:55)
	at org.jetbrains.kotlin.psi.KtModifierListOwnerStub.addModifier(KtModifierListOwnerStub.java:54)