refactored Tensor: needs for explicit context?

Refactor Tensor has a context properties that define the neighborhood of data that are guaranteed to be in storage. Yet, having access to storage dimensions might be sufficient, for instance, to check if all accessed data are well defined.
An possible improvement might then be not to store the context and to provide only a check function (are all neighboors guaranteed to be in storage) and construction/resizing/... from required context.