How to add a custom button with event emmeter ?

Hey,

I'd like to add a custom button on each row. I achieved it dealing with the 'html' property and the sanitizer, but I couldn't find a way to handle the event ? Is it possible to add an event emitter which is correctly interpreted by ng2? Bypassing HTML & JS Security ?

I can't listen directly to the button events.

What I'm currently doing:
```
{
columns: {
test: {
title: 'fire',
type: 'html',
valuePrepareFunction: (value) => {
return this._sanitizer.bypassSecurityTrustHtml('TEST'); //Click listener not interpreted...
}
}
}
};
```

Then add an event on the table
``

Set the selected item
```
onSelect(event){
this.selectedItem=event.data._id;
}
```

Then add an outside button to the table that handle the wanted event.

Thanks