message: Update code to use convert_to_tensor_or_indexed_slices, since features may be SparseTensors as well.
diff: @@ -151,7 +151,7 @@ def make_input_layer_with_layer_annotations(original_input_layer):
  # spec and looking at the keys.
  spec = feature_column_lib.make_parse_example_spec(feature_columns)
  for key in spec.keys():
  - tensor = ops.convert_to_tensor(features[key])
  + tensor = ops.convert_to_tensor_or_indexed_slices(features[key])
  ops.add_to_collection(
  LayerAnnotationsCollectionNames.keys(
  LayerAnnotationsCollectionNames.UNPROCESSED_FEATURES), key)
  