text: """DateRange module
  
  This module defines the DateRange object.
  """
  
  class DateRange(dict):
      """An object representing a date range.
  
      DateRange object uses date in ISO format 'YYYY-MM-DD'.
      """
  
      def __init__(self, start_date: str, end_date: str):
          """Initialises a DateRange object.
          """
          self['startDate'] = start_date
          self['endDate'] = end_date
  