# File lib/rack/reloader.rb, line 23
23:     def initialize(app, cooldown = 10, backend = Stat)
24:       @app = app
25:       @cooldown = cooldown
26:       @last = (Time.now - cooldown)
27:       @cache = {}
28:       @mtimes = {}
29: 
30:       extend backend
31:     end