relaton/relaton-bib

class Object
  def duplicable?
    true
  end

  def deep_dup
    duplicable? ? dup : self
  end
end

class Array
  def deep_dup
    map(&:deep_dup)
  end
end

# class Hash
#   def deep_dup
#     hash = dup
#     each_pair do |key, value|
#       if key.frozen? && ::String === key
#         hash[key] = value.deep_dup
#       else
#         hash.delete(key)
#         hash[key.deep_dup] = value.deep_dup
#       end
#     end
#     hash
#   end
# end