title: Component has Render Method, but does Not Extend React.Component
body: <p><code>Component appears to have a render method, but doesn't extend React.Component. This is likely to cause errors. Change &lt;Test&gt; to extend React.Component instead</code></p>
  
  <p>Using the <a href="https://github.com/jarradseers/extends-classes" rel="nofollow noreferrer">extends-classes</a> library causes a react component to fail rendering with the above error. I'd like to compose a class featuring the React.Component methods and some other methods contained in a different class so I can split my code more concisely.</p>
  
  <p>Example:</p>
  
  <pre><code>class Test extends classes (React.Component, OtherTestClass) {
  }
  </code></pre>
  
  <p>Is there a way to suppress the error or is there some other strategy I should consider?</p>