<kotlin companion object constructor> im studying ...

# stackoverflow

[user]

kotlin companion object constructor
im studying kotlin with design pattern.
so i write singleton pattern.
below code is test code.
first show that instance is only one.
second show that there is no public constructor.
import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Assertions.assertSame
import org.junit.jupiter.api.Test

class TestSimpleSingleton {
@Test
fun testCreateSingleton() {
val s = Singleton.Instance()
val s2 = Singleton.Instance()
assertSame(s, s2)...