module AbstractController::Caching::Fragments

def read_fragment(key, options = nil)

(see +expire_fragment+ for acceptable formats).
Reads a cached fragment from the location signified by +key+ 
def read_fragment(key, options = nil)
  return unless cache_configured?
  key = combined_fragment_cache_key(key)
  instrument_fragment_cache :read_fragment, key do
    result = cache_store.read(key, options)
    result.respond_to?(:html_safe) ? result.html_safe : result
  end
end