new_contents: """empty message
  
  Revision ID: d1d9da22c976
  Revises: ('4da6791b4a10', 'c13728c5e64e')
  Create Date: 2016-12-30 22:30:24.718796
  
  """
  
  # revision identifiers, used by Alembic.
  revision = 'd1d9da22c976'
  down_revision = ('4da6791b4a10', 'c13728c5e64e')
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      pass
  
  
  def downgrade():
      pass
  
subject: Add missing migration