title: How to have unique suggestion on input in SAPUI5
body: <p>I am trying to get suggestions from input box, but if model has multiple values in wheelName like "wheel1", "wheel1", "wheel2", and with this, when I enter "wheel1" in inputbox, i get 2 suggestions as wheel1, wheel1, but i want unique suggestion i.e. wheel1 to be shown only once.</p>
  
  <p>Input declaration looks like below:-</p>
  
  <pre><code>&lt;Input
              id="wheelInput"
              type="Text"
              placeholder="Enter Wheel..."
              showSuggestion="true"
              maxLength="40"
              startSuggestion="3"
              suggestionItems="{wheel&gt;/results}" &gt;
              &lt;suggestionItems&gt;
                  &lt;core:Item text="{wheel&gt;wheelName}"/&gt;
              &lt;/suggestionItems&gt;
          &lt;/Input&gt;
  </code></pre>