On: Kotlin: statically typed programming language that...

[bartonfink]

Presumably because, among the languages (and standard libraries) you mentioned that have implemented this pattern, Groovy is the language that is most tightly associated with the JVM (which Kotlin is obviously targeting).

[vorg → bartonfink]

> Groovy is the language that is most tightly associated with the JVM

That could've been very true 6 years ago, when Groovy 1.0 was released, but I'd have to challenge that for 2012 (and 2013).