Currently, when using the `onDrill` in the GD-UI, you can define which headers and attributes are drillable. The `onDrill` callback however returns the measures and attributes used in the chart. It’d be useful to be able to define other attributes to be returned or returning the entire entity for the drillable item would suffice as well.
This is useful for returning attributes for further processing or lookups without exposing additional information to the end user. For example, the name of an entity is more useful than an ID for the end user, for a developer though, returning the ID is more useful than the name. This also saves a step from having to do a lookup by a potentially non-unique string.