all_helpers_from_path

# File actionpack/lib/action_controller/metal/helpers.rb, line 101
      def all_helpers_from_path(path)
        helpers = Array(path).flat_map do |_path|
          extract = /^#{Regexp.quote(_path.to_s)}\/?(.*)_helper.rb$/
          names = Dir["#{_path}/**/*_helper.rb"].map { |file| file.sub(extract, '\1'.freeze) }
          names.sort!
        end
        helpers.uniq!
        helpers
      end