http://www.slideshare.net/aalmiray/groov-for-java-developers
http://www.slideshare.net/aalmiray/functional-groovy-confess
http://www.slideshare.net/aalmiray/javaone-getting-funky-with-groovy
https://speakerdeck.com/glaforge/groovy-in-2014-and-beyond-at-gr8conf-europe-2014