Apache Groovy's original creator, James Strachan, worked on Kotlin for a while after, er, leaving the project, as also did Alex Tkachman, creator of Groovy++ wh

Apache Groovy's original creator, James Strachan, worked on Kotlin for a while after, er, leaving the project, as also did Alex Tkachman, creator of Groovy++ which was cloned as the static typing facility in Groovy 2.x.