old_contents: """Defines the Settings model"""
  
  from google.appengine.ext import ndb
  
  from c3po.db import groupme_conf  # pylint: disable=unused-import
  from c3po.db import trello_conf  # pylint: disable=unused-import
  from c3po.db import weather_conf  # pylint: disable=unused-import
  from c3po.persona import base
  from c3po.persona import beasts
  from c3po.persona import eastside
  from c3po.persona import small_group
  
  PERSONA_MAP = {
      'base': base.BasePersona,
      'beasts': beasts.BeastsPersona,
      'eastside': eastside.EastsidePersona,
      'small_group': small_group.SmallGroupPersona,
  }
  
  
  class Settings(ndb.Model):
      """Models the mapping between group ID and bot ID."""
      provider_name = ndb.StringProperty(required=True)
      persona_name = ndb.StringProperty(required=True)
  
      # Arbitrary identifier to be included in every callback URL to identify
      # which bot the callback is for. NOT associated with any particular
      # provider.
      bot_id = ndb.StringProperty(required=True)
  
      bot_name = ndb.StringProperty(required=True, default='C-3PO')
      bot_mentioned_regex = ndb.StringProperty(required=True,
                                               default='(c-3po|c3po)')
  
      # Throwback chooses a random date between this date and current date
      throwback_first_date = ndb.DateTimeProperty(auto_now_add=True)
  
      # Service Configuration
      groupme_conf = ndb.StructuredProperty(groupme_conf.GroupmeConf)
      trello_conf = ndb.StructuredProperty(trello_conf.TrelloConf)
      weather_conf = ndb.StructuredProperty(weather_conf.WeatherConf)
  
      def get_persona(self):
          """Maps and initializes the response manager."""
          persona_name = str(self.persona_name)
          if persona_name not in PERSONA_MAP:
              raise ValueError("'%s' is not a valid response manager."
                               % persona_name)
  
          persona = PERSONA_MAP[persona_name]
          return persona()
  
new_contents: """Defines the Settings model"""
  
  from google.appengine.ext import ndb
  
  from c3po.db import groupme_conf  # pylint: disable=unused-import
  from c3po.db import trello_conf  # pylint: disable=unused-import
  from c3po.db import weather_conf  # pylint: disable=unused-import
  from c3po.persona import base
  from c3po.persona import beasts
  from c3po.persona import eastside
  from c3po.persona import sara_lane
  from c3po.persona import small_group
  
  PERSONA_MAP = {
      'base': base.BasePersona,
      'beasts': beasts.BeastsPersona,
      'eastside': eastside.EastsidePersona,
      'saralane': sara_lane.SaraLanePersona,
      'small_group': small_group.SmallGroupPersona,
  }
  
  
  class Settings(ndb.Model):
      """Models the mapping between group ID and bot ID."""
      provider_name = ndb.StringProperty(required=True)
      persona_name = ndb.StringProperty(required=True)
  
      # Arbitrary identifier to be included in every callback URL to identify
      # which bot the callback is for. NOT associated with any particular
      # provider.
      bot_id = ndb.StringProperty(required=True)
  
      bot_name = ndb.StringProperty(required=True, default='C-3PO')
      bot_mentioned_regex = ndb.StringProperty(required=True,
                                               default='(c-3po|c3po)')
  
      # Throwback chooses a random date between this date and current date
      throwback_first_date = ndb.DateTimeProperty(auto_now_add=True)
  
      # Service Configuration
      groupme_conf = ndb.StructuredProperty(groupme_conf.GroupmeConf)
      trello_conf = ndb.StructuredProperty(trello_conf.TrelloConf)
      weather_conf = ndb.StructuredProperty(weather_conf.WeatherConf)
  
      def get_persona(self):
          """Maps and initializes the response manager."""
          persona_name = str(self.persona_name)
          if persona_name not in PERSONA_MAP:
              raise ValueError("'%s' is not a valid persona."
                               % persona_name)
  
          persona = PERSONA_MAP[persona_name]
          return persona()
  
subject: Add missing Sara Lane persona to Settings