# File lib/apipie/application.rb, line 198
    def init_env
      @resource_descriptions = HashWithIndifferentAccess.new { |h, version| h[version] = {} }
      @controller_to_resource_id = {}

      # what versions does the controller belong in (specified by resource_description)?
      @controller_versions = Hash.new { |h, controller| h[controller] = [] }
    end