getlines (LineCache)

    # File lib/linecache.rb, line 201
      def getlines(filename, reload_on_change=false)
        filename = unmap_file(filename)
        checkcache(filename) if reload_on_change
        if @@file_cache.member?(filename)
          return @@file_cache[filename].lines
        else
          update_cache(filename, true)
          return @@file_cache[filename].lines if @@file_cache.member?(filename)
        end
      end