new_contents: # Copyright 2020 Google LLC
  #
  # 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.
  
  PULL_REQUEST_RELATED_COLUMNS = {
              'author': str, 'pull request id': int,
              'pull request created time': str,
              'pull request closed time': str,
              'pull request review time': float,
              'reverted pull request id': int,
              'pull request revert time': float,
              'num review comments': int,
              'num issue comments': int, 'issue comments msg': eval,
              'num approved reviewers': int,
              'approved reviewers': eval, 'num commits': int,
              'num line changes': int
              }
  
  FILE_RELATED_COLUMNS = {
              'files changes': eval,
              'file versions': eval,
              'review comments msg': eval
              }
  
subject: Move constants to a separate file