```
val grouped: Map<TypeA, MutableList<Type...
# getting-starteds
Shawn
10/03/2018, 12:34 AM Copy code
val grouped: Map<TypeA, MutableList<TypeB>> = listOfTypeB.groupByTo(mutableMapOf()) { TypeA(it.a) }👍 1
Shawn
10/03/2018, 12:34 AMval grouped: Map<TypeA, MutableList<TypeB>> = listOfTypeB.groupByTo(mutableMapOf()) { TypeA(it.a) }