old_contents: """ Errors generated by this module
  """
  
  
  class ConfigException(Exception):
      pass
  
  
  class FillValueException(Exception):
      """ All of a tile is "fill" values
      """
      pass
  
new_contents: """ Errors generated by this module
  """
  
  
  class ConfigException(Exception):
      pass
  
  
  class FillValueException(Exception):
      """ All of a tile is "fill" values
      """
      pass
  
  
  class ProductNotFoundException(Exception):
      pass
  
subject: Add exception for empty db search return