There, it is used as an inline cell editor. You can check it out here: grid-editing-cell-auto-complete.
Here is how the web component looks like when you add it to your web page:
All you need to do is to add a reference to smart.elements.js, smart.default.css and type the following:
<smart-input data-source="[South America, North America, Asia, Africa, Europe]"></smart-input>