message: Reexport losses, metrics, initializers, optimizers. Fix
  These symbols were previously exposed. Lazy loading + deprecation warnings required making them be exposed just from core, not virtual pip. But we don't use deprecation warnings in TF2.0, so they need to be brought back.
diff: @@ -123,7 +123,14 @@ try:
  except NameError:
  pass
  +# TODO(mihaimaruseac): Revisit all of this once we release 2.1
  # Manually patch keras and estimator so tf.keras and tf.estimator work
  keras = _sys.modules["tensorflow.keras"]
  if not _root_estimator: estimator = _sys.modules["tensorflow.estimator"]
  +# Also import module aliases
  +try:
  + from tensorflow_core import losses, metrics, initializers, optimizers
  +except ImportError:
  + pass
  +
  # LINT.ThenChange(//tensorflow/virtual_root_template_v1.__init__.py.oss)
  