I have two nullable ancapsulated objects like:

class NullableObject(
    val a : AnotherNullable? = null
    val b : String = "b"
}

class AnotherNullable(val id: String) {
    val hash: Integer? = someHashFunction(id)
    val hashInvalidHash: Boolean = (hash == null)

}

where I use the not() operator like:

val hasAnotherNullableHash = nullableObject?.anotherNullableObject?.hasInvalidHash.not() ?: false

I read the hasInvalidHash property or set a default false if either nullableObject or anotherNullableObject were null ..

Question:
How to I transform this .not() operator to the unary ! ?

val hasAnotherNullableHash = !nullableObject?.anotherNullableObject?.hasInvalidHash!!

I have to !! and the default value false is also not possible..