title: Fabric proguard rules
body: <p>I have found on fabric page following note </p>
  
  <blockquote>
    <p>For Fabric to properly de-obfuscate your crash reports, you need to
    remove this line from your ProGuard config:</p>
    
    <p>-printmapping mapping.txt</p>
  </blockquote>
  
  <p>Can anyone clear for me this thing. How I will reobfuscate crash logs by myself if I remove this line?</p>