title: file from where function was sourced
body: <p>When debugging a function, <code>R</code> displays the full filename from where the function was sourced. Example output shown below. </p>
  
  <p><strong>Where is this information (filename) stored and is it user accessible?</strong></p>
  
  <pre><code>    &gt; debugonce(myFunction)
      &gt; myFunction(x)
      debugging in: myFunction(x)
      debug at /path/to/filename.r#41: {
  
          &lt; body of myFunction &gt;
      }
      Browse[2]&gt; Q
      &gt; 
  </code></pre>