This function will take as input some text and will return an image showing that text in a grey square or circle.
For example, if you have a field/column with the following expression:
The resulting data type will be either Thumbnail or Image and you can then use the image in your app, e.g. like so:
In the above image, there is a field called [Name] with values like "Icon 1", "Icon 2", etc and this field is also represented inside the image using Text_Icon([Name]).
Note: if this expression and virtual field is set to type Thumbnail, only square images are supported in UX views. If set to type Image, squares and circles are supported.