Support for sub/detail rows

[timeu]

This might not be strictly according to the material design spec, but could be potentially useful.
As far as I can tell currently there is no way to create sub/detail rows that can be expanded. This might be handy if there are two many information and you want to reveal more infos in a detail section.

Something along these lines:

Expand/Collapse in list controls:
https://www.google.com/design/spec/components/lists-controls.html#lists-controls-types-of-list-controls

Or detail view on vaadin-grid:
https://vaadin.com/docs/-/part/elements/vaadin-grid/details.html

Maybe it would be possible to provide some hooks to create those sub-rows/detail

[raffaeu]

I am for the same thing. At the moment I moved to vaadin-grid which provides a "details view" that is not really what I am looking for. I would prefer to move back to paper-datatable, which I found more stable, but I really need some sort of grouping, details or subgrid mechanism.