message: Fix a bug in export GTFlow model to shared format with sparse float split
diff: @@ -151,7 +151,7 @@ def convert_to_universal_format(dtec, sorted_feature_names,
  generic_tree_model_pb2.InequalityTest.LESS_OR_EQUAL)
  inequality_test.threshold.float_value = split.threshold
  elif node_type == "sparse_float_binary_split_default_right":
  - split = gtflow_node.sparse_float_binary_split_default_right
  + split = gtflow_node.sparse_float_binary_split_default_right.split
  node.default_direction = (
  generic_tree_model_pb2.BinaryNode.RIGHT)
  feature_id = split.feature_column + num_dense
  