module Bundler::Plugin

def hook(event, *args, &arg_blk)
  return unless Bundler.feature_flag.plugins?
  plugins = index.hook_plugins(event)
  return unless plugins.any?
  (plugins - @loaded_plugin_names).each {|name| load_plugin(name) }
  @hooks_by_event[event].each {|blk| blk.call(*args, &arg_blk) }
end