package net.pterodactylus.sone.test import java.lang.reflect.* private val modifiers = Field::class.java.getDeclaredField("modifiers").apply { isAccessible = true } fun setField(instance: Any, name: String, value: Any?) { generateSequence>(instance.javaClass) { it.superclass } .flatMap { it.declaredFields.asSequence() } .filter { it.name == name } .toList() .forEach { field -> field.isAccessible = true modifiers.setInt(field, field.modifiers and Modifier.FINAL.inv()) field.set(instance, value) } }