title: How to know to which package a particular function belongs to in R prior to package loading?
body: <p>Example, I know many popular functions, to name one like <code>tbl_df()</code>. I usually do not remember which package it belongs to i.e. <code>data.table</code> or <code>dplyr</code>. So I have to always remember and load a package and I can not do <code>?tbl_df</code> unless I have loaded the correct package.</p>
  
  <p>Is there a way to know to which package a particular function belongs to, prior to loading or installing of the package in R console itself.</p>
  
  <p>Any help is highly appreciated.
  Thanks.</p>