title: Value of type 'String' has no member 'removeVowels'
body: <p>I'm trying to create a method that will remove any vowel from a given sentence. I created the function 'removeVowels' which in my mind seems right. But when I try to call that function after a given sentence I get the error "Value of type 'String' has no member 'removeVowels'".</p>
  
  <pre><code>var sent: String = "This website is for losers LOL!"
  
  func removeVowels(sent: String) -&gt; String {
      let vowels: [Character] = ["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"]
      let result = String(sent.characters.filter{vowels.contains($0)})
      return result
  }
  
  print(sent.removeVowels)
  </code></pre>