ve a negative impact on performance. Cross-fitting is
again another reasonable approach to circumventing this issue.
Augmentation functions can be constructed (with cross-fitting as an
option) via the <code>create.augmentation.function()</code> function,
which works similarly as the <code>create.propensity.function()</code>
function. The basic usage is as follows:</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" ta