title: How to exclude package from grails log4j appender
body: <p>I have an appender configured in <code>Config.groovy</code> like this:</p>
  
  <pre><code>all myLog:['grails.app.controller', 'grails.app.service', 'grails.app.domain', 'grails.app.task'], additivity: false
  </code></pre>
  
  <p>Now there is a special package inside the above packages which I don't want to log, e.g. <code>grails.app.service.some.service</code>.</p>
  
  <p>How can I exclude this package from the <code>myLog</code> Appender? I already found <a href="https://stackoverflow.com/questions/4140095/exclude-a-class-from-a-log4j-appender">this StackOverflow question and answer</a>, but I don't know how to "translate" this into my grails configuration.</p>