code: function(responses) {
      assert(_.isObject(responses))
      self = this
      var descriptor = function(response) {
        return {
          name: response.statusCode.toString(),
          statusCode: response.statusCode,
          description: response.description,
          schema: self._removeNoDocumentProperties(response.schema),
          example: response.example,
          headers: response.headers.length === 0 ? null : _.join(_.map(response.headers, function(header) {
            return _.trim(header.toString())
          }), '\n')
        }
      }
      return _.sortBy(_.map(responses, descriptor), function (r) { return r.name })
    }
docs: ********************************************************************
  _generateResponseDescriptors
  
  @param {object} responses
  @returns {object}