title: What are the backticks in Apollo type definitions?
body: <p>For instance the two ` here:</p>
  
  <pre><code>const typeDefinition = [`
    schema {
      query: RootQuery
    }
  
    type RootQuery {
      aNumber: Int
    }
  `];
  </code></pre>
  
  <p><a href="http://docs.apollostack.com/apollo-server/generate-schema.html" rel="nofollow">http://docs.apollostack.com/apollo-server/generate-schema.html</a></p>