require_fixture_classes

# File activerecord/lib/active_record/fixtures.rb, line 783
      def require_fixture_classes(fixture_set_names = nil)
        if fixture_set_names
          fixture_set_names = fixture_set_names.map { |n| n.to_s }
        else
          fixture_set_names = fixture_table_names
        end

        fixture_set_names.each do |file_name|
          file_name = file_name.singularize if ActiveRecord::Base.pluralize_table_names
          try_to_load_dependency(file_name)
        end
      end