A modern programming language that makes developers happier.

kotlinlang

There is no standart syntax in kotlin for this, some people use something like `ifNonNull(type, events) { t,e -&gt; t to e }`, but nothing in stdlib.
There is discussion about this on Kotlin forum

Also you can use early return to avoid nullability, also this approach is more efficient
```data.mapNotNull {
    val json = it.asJsonObjectOrNull()
    val type = json?.get("type")?.asStringOrNull() ?: return@mapNotNull null
    val events = json?.get("events")?.asJsonArrayOrNull() ?: return@mapNotNull null

    type to events
}.toMap()```

This is looking promising and fast 
Thanks <@U0BRK9HC5>