This is a legacy API for consuming dataset elements and should only be used
during transition from TF 1 to TF 2. Note that using this API should be
a transient state of your code base as there are in general no guarantees
about the interoperability of TF 1 and TF 2 code.
In TF 2 datasets are Python iterables which means you can consume their
elements using for elem in dataset: ... or by explicitly creating iterator
via iterator = iter(dataset) and fetching its elements via
values = next(iterator).
(Optional.) If non-empty, the returned iterator will be shared
under the given name across multiple sessions that share the same devices
(e.g. when using a remote server).