val list = mutableListOf<Foo>()

bar(*foo.toTypedArray())

val isCool = fun(a: Int) = a > 0
val isCool = { a: Int -> a > 0 }
fun isCool(a: Int) = a > 0

private companion object {}

run

String[][] table = {
	{"a","b","c"},
	{"d","e","f"},
	{"g","h","i"},
	{"j","k","l"},
};

@Embeddable
data class RouterId(val routerId: String) {

    init {
        val octets = routerId.split(":")

        if (octets.size != 6) {
            throw IllegalArgumentException("$routerId does not consist of 6 octets")
        }

        for (octet in octets) {
            Integer.parseInt(octet, 16)
        }
    }

    override fun toString(): String {
        return routerId
    }
}

java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.text.StringsKt__StringsKt.split, parameter $receiver
	at kotlin.text.StringsKt__StringsKt.split(Strings.kt) ~[kotlin-stdlib-1.1.3.jar:1.1.3]
	at kotlin.text.StringsKt__StringsKt.split$default(Strings.kt:1153) ~[kotlin-stdlib-1.1.3.jar:1.1.3]
	at domain.model.aircraft.RouterId.<init>(RouterId.kt:9) ~[main/:na]
        ....

build.gradle

plugins {
    id "org.jetbrains.kotlin.jvm" version "1.1.3"
    id "org.jetbrains.kotlin.plugin.noarg" version "1.1.3"
    id "org.jetbrains.kotlin.plugin.jpa" version "1.1.3"

    id "org.springframework.boot" version "1.5.4.RELEASE"
}

1.1.2

init

interface MyInterface {
    var a: String
}

class ClassA : MyInterface {
    override var a = ""
}

lateinit

by lazy { ... }

fun `[`() {}

/

\

[

]

= messages[localizablePlugin]?.keys ?: throw IllegalArgumentException(...)

io.reactivex.Observable.*

*