Which functions in the Unit class have overridden implementations?

In Kotlin, the Unit class represents a type similar to void in other languages and is a singleton. The Unit class overrides the following functions from the base class Any:

• toString() — returns a string representation of the object, usually "kotlin.Unit".
• equals(other: Any?) — checks for equality with another object.
• hashCode() — returns the hash code of the object.

An example of overriding in Kotlin (simplified):

object Unit {
    override fun toString() = "kotlin.Unit"
    override fun equals(other: Any?) = other is Unit
    override fun hashCode() = 0
}