module ApplicationConfig module DataStructures class AlwaysNullNode def initialize end def nil? return true end def to_s "" end def ==(other) other == nil end def eql?(other) other.eql?(nil) end def [](key) ApplicationConfig::DataStructures::AlwaysNullNode.new end def method_missing(method) ApplicationConfig::DataStructures::AlwaysNullNode.new end end end end