title: Google-libphonenumber validating phone number Cannot read property 'isValidNumber'
body: <p>I would like to validate a phone number with google-libphonenumber but its giving me an error while trying to do it.</p>
  
  <blockquote>
    <p>console.log(phoneUtil.isValidNumber(phoneUtil.parse('202-456-1111',
    'US')));
                         ^</p>
    
    <p>TypeError: Cannot read property 'isValidNumber' of undefined</p>
  </blockquote>
  
  <p>And thats how i'm doing the validation</p>
  
  <pre><code>var phoneUtil = require('google-libphonenumber').phoneUtil
          , PNF = require('google-libphonenumber').PhoneNumberFormat
          , PNT = require('google-libphonenumber').PhoneNumberType;
  console.log(phoneUtil.isValidNumber(phoneUtil.parse('202-456-1111', 'US')));
  </code></pre>
  
  <p>This code i got from a website, i couldn't find inside the api documentation, i was trying to test using this to see if it works, i couldn't find anything that gives me a direction how to validate this any phone number.</p>
  
  <p>Whats the problem?</p>