# 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