Nightwatch perform() not method after expect

So I believe after looking through the documentation that this should work correctly, but I would like to have something run one the expect has finished, however currently it not seem to be working.

Working

browser
  .url('https://www.google.co.uk/?')
  .expect.element('.Google Search').value.to.contain('Dashboard')
  .perform(function() {
    console.log('elementValue');
  })

Broken

browser
  .url('https://www.google.co.uk/?')
  .expect.element('.Google Search').value.to.contain('Dashboard')
  .perform(function() {
    console.log('elementValue');
  })


Error while running perform command: browser.moveToElement(...).doubleClick(...).setValue(...).click(...).expect.element(...).text.to.contain(...).perform is not a function