class ActionDispatch::Routing::DeprecatedMapper::Resource

def initialize(entities, options, defaults)
  @plural   ||= entities
  @singular ||= options[:singular] || plural.to_s.singularize
  @path_segment = options.delete(:as) || @plural
  @options = options
  @defaults = defaults
  arrange_actions
  add_default_actions
  set_allowed_actions
  set_prefixes
end