old_contents: from django.contrib import admin
  
  from .models import NurseSource, NurseReg
  
  admin.site.register(NurseSource)
  admin.site.register(NurseReg)
  
new_contents: from django.contrib import admin
  from control.utils import CsvExportAdminMixin
  
  from .models import NurseSource, NurseReg
  
  
  class NurseRegAdmin(CsvExportAdminMixin, admin.ModelAdmin):
      csv_header = [
          'cmsisdn', 'dmsisdn', 'rmsisdn', 'faccode',
          'id_type', 'id_no', 'passport_origin', 'dob',
          'nurse_source', 'persal_no', 'opted_out',
          'optout_reason', 'optout_count', 'sanc_reg_no',
          'created_at', 'updated_at']
  
      def clean_csv_line(self, model):
          return [
              model.cmsisdn, model.dmsisdn, model.rmsisdn, model.faccode,
              model.id_type, model.id_no, model.passport_origin, model.dob,
              model.nurse_source, model.persal_no, model.opted_out,
              model.optout_reason, model.optout_count, model.sanc_reg_no,
              model.created_at, model.updated_at]
  
  admin.site.register(NurseSource)
  admin.site.register(NurseReg, NurseRegAdmin)
  
subject: Add export inline for Nurse Registrations