convert_hashes_to_parameters

# File actionpack/lib/action_controller/metal/strong_parameters.rb, line 320
      def convert_hashes_to_parameters(key, value)
        if value.is_a?(Parameters) || !value.is_a?(Hash)
          value
        else
          # Convert to Parameters on first access
          self[key] = self.class.new(value)
        end
      end