title: Use another property in data element as id
body: <p>I have data elements:</p>
  
  <pre><code>{
      'rid': '1',
      'id': '2',
      'name': 'asdw'
  },
  {
      'rid': '2',
      'id': '2',
      'name': 'dsddf'
  },
  {
      'rid': '3',
      'id': '2',
      'name': 'fffgg'
  }
  </code></pre>
  
  <p>Each data element have the same value of "id" property (slickgrid throws me "Each data element must implement a unique 'id' property"). How can i use another property in data element as id (for example "rid")?
  I can not remove props from data object.</p>