any clue why does this not compile? ```data class ...

# getting-started

[poohbar]

any clue why does this not compile?

data class Customer(
    val id: String,
    val firstName: String,
    val lastName: String,
    val age: Int
)

val joe = Customer(
    "123",
    "Joe",
    "Smith",
    55
)

joe::class.declaredMemberProperties
    .map { it.name to it.get(joe)}