Redmine/lib/plugins/awesome_nested_set/lib/awesome_nested_set.rb

require 'awesome_nested_set/awesome_nested_set'
ActiveRecord::Base.send :extend, CollectiveIdea::Acts::NestedSet

if defined?(ActionView)
  require 'awesome_nested_set/helper'
  ActionView::Base.send :include, CollectiveIdea::Acts::NestedSet::Helper
end