title: How to unmask functions masked by `library(...)`?
body: <p>Suppose that I want to use several functions in the <code>foo</code> package, but then I run into this:</p>
  
  <pre><code>&gt; library(foo)
  
  Attaching package: ‘foo’
  
  The following objects are masked from ‘package:bar’:
  
      baz
  </code></pre>
  
  <p>Supposing that</p>
  
  <ol>
  <li>the functions in <code>foo</code> that I'm interested in are entirely independent from <code>foo::baz</code>; and</li>
  <li>I want <code>bar::baz</code> (now masked), not <code>foo::baz</code>.</li>
  </ol>
  
  <p>Is there a way that I can unmask <code>bar::baz</code> short of unloading <code>foo</code> altogether?</p>