title: Jenkins matrix project combination filter - how to configure the groovy expression?
body: <p>I have  a Jenkins multi configuration project with two axis:</p>
  
  <ol>
  <li><p><code>sbBrowser</code> with values:</p>
  
  <pre><code>firefox
  ie
  chrome
  </code></pre></li>
  <li><p><code>envConfig</code> with values:</p>
  
  <pre><code>pp1
  pp2
  pp3
  staging
  systemtest
  </code></pre></li>
  </ol>
  
  <p>I have to create combination filter to run only with <code>sbBrowser = firefox</code> on all of the <code>envConfig</code>.</p>
  
  <p>How to build the expression?</p>
  
  <p>Something like:</p>
  
  <pre><code>sbBrowser=="firefox" &amp;&amp; envConfig=="pp1" "pp2" "pp3" "staging" "systemtest"
  </code></pre>