title: How to use foreach library without loading it
body: <p>Is there any way to use the <em>foreach</em> package without loading it? I want to use it in another package and preferably I do not want to load it.
  If I simply write</p>
  
  <pre><code> foreach::foreach(i = 1:3) %do% sqrt(i)
  </code></pre>
  
  <p>then I get the following error.</p>
  
  <pre><code>Error: could not find function "%do%"
  </code></pre>
  
  <p>Any idea or suggestion? The reason for doing so is that I want to use the <code>.combine</code> option of <code>foreach()</code> to combine the outputs of <em>data.table</em> class together.</p>