title: Write Java8 Lambdas in Groovy 1.x
body: <p>Is there a way to write Java8 lambda expressions in groovy 1.x? 
  I know that groovy 2.3.x supports Java8 lambda expressions from this <a href="https://stackoverflow.com/questions/23906748/groovy-compiler-does-not-accept-java-8-lambdas">post</a> but is it possible to write a Java 8 lambda in groovy? 
  I have some Java 8 code that I'm testing with Spock, but my project is stuck using groovy 1.x. </p>