title: Shiny print reactive df to console (glimpse(myreactive_df) for debugging purposes?
body: <p>I'm trying to debug my Shiny app and would like to view a reactive dataframe with e.g. glimpse(df).</p>
  
  <p>Initially I tried to create a breakpoint and then view the environment by my reactive df is a value not an object when used inside server.r. I also tried <code>browser()</code> but was not sure what it would do.</p>
  
  <p>I did some searching on SO and tried various things using sink(), renderPrint() but had no success.</p>
  
  <p>How can I print the contents of <code>glimpse(some_reactive_df())</code> to the console when I run my app?</p>