old_contents: from django.utils.translation import ugettext as _
  
  REPORT_BUILDER_EVENTS_KEY = 'REPORT_BUILDER_EVENTS_KEY'
  
  DATA_SOURCE_NOT_FOUND_ERROR_MESSAGE = _(
      'Sorry! There was a problem viewing your report. '
      'This likely occurred because the application associated with the report was deleted. '
      'In order to view this data using the Report Builder you will have to delete this report '
      'and then build it again. Click below to delete it.'
  )
  
new_contents: from django.utils.translation import ugettext_lazy as _
  
  REPORT_BUILDER_EVENTS_KEY = 'REPORT_BUILDER_EVENTS_KEY'
  
  DATA_SOURCE_NOT_FOUND_ERROR_MESSAGE = _(
      'Sorry! There was a problem viewing your report. '
      'This likely occurred because the application associated with the report was deleted. '
      'In order to view this data using the Report Builder you will have to delete this report '
      'and then build it again. Click below to delete it.'
  )
  
subject: use ugettext_lazy