title: Property does not exist on type JQueryStatic
body: <p>I have written a jQuery plugin where I use jQuery's internal _data method.
  Which leads to the above compiler error.</p>
  
  <pre><code>(function ($) {     
  
  var evts = $._data(document, 'events'); // internal method
  ....
  </code></pre>
  
  <p>Can I supress this error and how?
  What is the recommended way to approach this issue?</p>
  
  <p>I know I could do the following:</p>
  
  <pre><code>$["_data"]
  </code></pre>
  
  <p>or</p>
  
  <pre><code>($ as any)._data
  </code></pre>
  
  <p>but I would prefer making a <code>$._data</code> a valid method call.</p>