Example string for a component

Maybe we could add a example string for inserting a component (with some default attribute and style values). So a Designer could use this info.

So what I mean in my designer: 
https://github.com/node-projects/web-component-designer-demo/blob/1db285872f8c9173db00a33f9ede29f55af31cc2/src/elements-demo.json#L4
I have a list of attributes, but that sample could also be a html part string