eager_load!

# File railties/lib/rails/engine.rb, line 484
    def eager_load!
      # Already done by Zeitwerk::Loader.eager_load_all. We need this guard to
      # easily provide a compatible API for both zeitwerk and classic modes.
      return if Rails.autoloaders.zeitwerk_enabled?

      config.eager_load_paths.each do |load_path|
        # Starts after load_path plus a slash, ends before ".rb".
        relname_range = (load_path.to_s.length + 1)...-3
        Dir.glob("#{load_path}/**/*.rb").sort.each do |file|
          require_dependency file[relname_range]
        end
      end
    end