title: what does >> and 1* means in this groovy statement?
body: <p>I am working on grails/groovy project and while reading their test documentation came across this line of code</p>
  
  <pre><code>1 * myService.prova() &gt;&gt; { true }
  </code></pre>
  
  <p>I am unable to understand what does 1 * means here also as >> is right shift operator what does it mean here ?  I have searched so much but unable to get any proper explanation.
  <a href="https://grails.github.io/grails-doc/latest/guide/testing.html" rel="noreferrer">Grails Test Documenation</a></p>