new_contents: """
  
  Revision ID: 0144_add_notification_reply_to
  Revises: 0143_remove_reply_to
  Create Date: 2017-11-22 14:23:48.806781
  
  """
  from alembic import op
  import sqlalchemy as sa
  
  
  revision = '0144_add_notification_reply_to'
  down_revision = '0143_remove_reply_to'
  
  
  def upgrade():
      op.add_column('notifications', sa.Column('reply_to_text', sa.String(), nullable=True))
  
  
  def downgrade():
      op.drop_column('notifications', 'reply_to_text')
  
subject: Add a column to Notifications to store the reply_to_text. This is text value of the sender_id, depending on the channel this will be a SMS sender, email reply to address or a letter contact block. This is the first PR in a series to refactor how we send the "reply_to" the provider, eventually we can eliminate the notification_to_sms_sender and notification_to_email_to tables.