title: How to extract functions used in R package?
body: <p>I have inadvertently over-ridden the package I created with a different function, saved it, and closed R Studio. Now, my R package contains an unintended function.</p>
  
  <p>Thankfully, I did not install the package, so I still have the old package contents stored in my computer. </p>
  
  <p>Is there a way to extract the function from the installed package? It's one long function. Not more than one function.</p>
  
  <p>And, no, I do not have a backup, at least not the updated version.</p>