class ActiveSupport::InheritableOptions

h.boy # => ‘John’
h.girl # => ‘Mary’
h = ActiveSupport::InheritableOptions.new({ girl: ‘Mary’, boy: ‘John’ })
Use this if you already have some hash and you want to create a new one based on it.
hash inherited from another hash.
InheritableOptions provides a constructor to build an OrderedOptions

def inheritable_copy 

def inheritable_copy
  self.class.new(self)
end

def initialize(parent = nil) 

def initialize(parent = nil)
  if parent.kind_of?(OrderedOptions)
    # use the faster _get when dealing with OrderedOptions
    super() { |h, k| parent._get(k) }
  elsif parent
    super() { |h, k| parent[k] }
  else
    super()
  end
end