module ActiveRecord
module ActiveRecord::Acts
module ActiveRecord::Acts::Tree
module ActsAsTree
module ActsAsTree::ClassMethods
module ActsAsTree::InstanceMethods
module ActsAsTree::TreeView
module ActsAsTree::TreeWalker
class ActsAsTree::Railtie
acts_as_tree
2.9.1
ActsAsTree
ActiveRecord
ActiveRecord::Acts