title: ag-grid date column inRange filter - how do I access the "to" date in the test function?
body: <p>My <code>columnDef</code> for my date column includes this <code>filterOption</code>:</p>
  <pre><code>{
      displayKey: 'inRange',
      displayName: 'In range',
      test: function(filterValue, cellValue) {
          ...
      }
  },
  </code></pre>
  <p>When I run, <code>filterValue</code> is just the 'from' date of the filter.  How do I access the 'to' date of the filter in <code>test</code>?</p>
  <p>I tried:</p>
  <pre><code>{
      displayKey: 'inRange',
      displayName: 'In range',
      test: function(filterValue1, filterValue2, cellValue) {
          ...
      }
  },
  </code></pre>
  <p>But that just puts the cell value into <code>filterValue2</code>, and <code>cellValue</code> is undefined.</p>
  <p>How do I get the 'to' date so I can write my custom logic for <code>inRange</code>?</p>