lib/rack/unreloader.rb
def require(paths, &block)
      if @reloader
        @reloader.require_dependencies(paths, &block)
      else
        Unreloader.expand_directory_paths(paths).each{|f| super(f)}
      end
    end
def require(paths, &block)
      if @reloader
        @reloader.require_dependencies(paths, &block)
      else
        Unreloader.expand_directory_paths(paths).each{|f| super(f)}
      end
    end
Add a file glob or array of file globs to monitor for changes.