title: How can the Repast file sink filename be set programmatically?
body: <p>Does anybody know if there is a simple way to make the filename element path of an file sink variable according to one field in the model?
  So instead of using a fix path like :</p>
  
  <p> fixed_path/filename.csv</p>
  
  <p>{variable_path}/filename.csv</p>