title: How to deobfuscate an Android stacktrace using mapping file
body: <p>I got a stacktrace from the crashreporting system and it is obfuscated, like </p>
  
  <blockquote>
    <p>... Failed resolution of: Lru/test/c/b/a; ...</p>
  </blockquote>
  
  <p>I have a mapping file.</p>
  
  <p>How to deobfuscate this stacktrace using mapping.txt?</p>