text: begin_unit
  nl|'\n'
  comment|'#    Licensed under the Apache License, Version 2.0 (the "License"); you may'
  nl|'\n'
  comment|'#    not use this file except in compliance with the License. You may obtain'
  nl|'\n'
  comment|'#    a copy of the License at'
  nl|'\n'
  comment|'#'
  nl|'\n'
  comment|'#         http://www.apache.org/licenses/LICENSE-2.0'
  nl|'\n'
  comment|'#'
  nl|'\n'
  comment|'#    Unless required by applicable law or agreed to in writing, software'
  nl|'\n'
  comment|'#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT'
  nl|'\n'
  comment|'#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the'
  nl|'\n'
  comment|'#    License for the specific language governing permissions and limitations'
  nl|'\n'
  comment|'#    under the License.'
  nl|'\n'
  nl|'\n'
  comment|'# This is a placeholder for backports.'
  nl|'\n'
  comment|'# Do not use this number for new work.  New work starts after'
  nl|'\n'
  comment|'# all the placeholders.'
  nl|'\n'
  comment|'#'
  nl|'\n'
  comment|'# See this for more information:'
  nl|'\n'
  comment|'# http://lists.openstack.org/pipermail/openstack-dev/2013-March/006827.html'
  nl|'\n'
  nl|'\n'
  nl|'\n'
  DECL|function|upgrade
  name|'def'
  name|'upgrade'
  op|'('
  name|'migrate_engine'
  op|')'
  op|':'
  newline|'\n'
  indent|'    '
  name|'pass'
  newline|'\n'
  dedent|''
  endmarker|''
  end_unit
  