code: def run
        logger.info("#{self.class.to_s} is starting.")
        count_options = self.class.legacy_find_options.dup
        count_options.delete(:order)
        count_options.delete(:group)
        count_options.delete(:limit)
        count_options.delete(:offset)
        @num_of_records = self.class.legacy_model.count(count_options)
        if self.class.legacy_find_options[:limit] && (@num_of_records > self.class.legacy_find_options[:limit])
          run_in_batches @num_of_records
        else
          run_normal
        end
        logger.info("#{self.class.to_s} migrated all #{@num_of_records} records successfully.")
      end
docs: Runs the migration.
  
     MyMigration.new.run