title: How to include an offset component in a linear mixed model in Julia?
body: <p>I have a linear mixed effects model in R (<code>lme4</code>) and I want to run it in Julia using the <code>MixedModels</code> package. My problem is that <code>MixedModels</code> in Julia does not allow an offset variable as in <code>lme4</code>. Any suggestions?</p>
  
  <p>Example: <code>Y ~ X1 + X2 + X3 + X2|Group + X3|Group + offset(X4)</code></p>