Trait DataMarker

A DynamicDataMarker with a DataMarkerInfo attached.

Structs implementing this trait are normally generated with the data_struct! macro.

Implementing this trait enables this marker to be used with the main DataProvider trait. Most markers should be associated with a specific marker and should therefore implement this trait.

BufferMarker is an example of a marker that does not implement this trait.

Note: DataMarkers are quasi-const-generic compile-time objects, and as such are expected to be unit structs. As this is not something that can be enforced by the type system, we currently only have a 'static bound on them (which is needed by a lot of our code).