I think this feature is called “a class” in Kotlin...

# language-proposals

[elizarov]

I think this feature is called “a class” in Kotlin. Declare class Person(val name: String, val date: String), then use Person("John", "09-10-1974") instead of mapOf (:name to "John", :date to "09-10-1974). Now instead of person[:name] in Kotlin you do person.name.