$fields['refresh'] = BaseFieldDefinition::create('list_integer')
->setLabel(t('Update interval'))
->setDescription(t('The length of time between feed updates. Requires a correctly configured cron maintenance task.'))
$fields['refresh'] = BaseFieldDefinition::create('list_integer')
->setLabel(t('Update interval'))
->setDescription(t('The length of time between feed updates. Requires a correctly configured cron maintenance task.'))