old_contents: # coding=utf-8
  # Copyright 2022 The Fiddle-Config Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Init file for the `fiddle` package."""
  
  from fiddle.config import build
  from fiddle.config import Buildable
  from fiddle.config import Config
  from fiddle.config import Partial
  from fiddle.placeholders import Placeholder
  from fiddle.placeholders import PlaceholderKey
  from fiddle.placeholders import set_placeholder
  
new_contents: # coding=utf-8
  # Copyright 2022 The Fiddle-Config Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Init file for the `fiddle` package."""
  
  from fiddle.config import build
  from fiddle.config import Buildable
  from fiddle.config import BuildError
  from fiddle.config import Config
  from fiddle.config import Partial
  from fiddle.placeholders import Placeholder
  from fiddle.placeholders import PlaceholderKey
  from fiddle.placeholders import set_placeholder
  
subject: Add BuildError to the main __init__ file.