span>,</span>
<span>  <span class="va">...</span></span>
<span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for lm</span></span>
<span><span class="fu">ovb_partial_r2_bound</span><span class="op">(</span></span>
<span>  <span class="va">model</span>,</span>
<span>  <span class="va">treatment</span>,</span>
<span>  benchmark_covariates <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  kd <span class="op">=</span> <span class="fl">1</span>,</span>
<spa