Currently native lambda is nearly completed, please review the code.
If no major issues found, I want to merge it into master in 72 hours to
avoid lots of conflicts when merging.
P.S. Here is the test cases. As for callable native lambda and
nested native lambda, they are on my TODO list.
Sent from: http://groovy.329449.n5.nabble.com/Groovy-Dev-f372993.html