User classes may implement DataContext, but users may not want or be able to add this interface to their classes (e.g. if they are domain objects and/or come from provided implementations out of their control).

Provide a "DataContext wrapper" that turns a plain object into at `DataContext`.

e.g. DataContextAdapter.of(Object)

note: I am not sure about the name (DataContextWrapper? DataContextAdapter?) – must think of something better.