title: es6 import from underscore
body: <p>I wanted to double check to make sure I understand imports enough to know if it is ok to do <code>import {_.identity} from 'underscore'</code> opposed to <code>import _ from 'underscore'</code>? That is the only use of underscore if the particular file.</p>
  
  <p>Thank you for your help</p>