docs: function(expected, response) {
  
          expected = _.isObject(expected) && _.has(expected, 'value') ? expected : { value: expected };
  
          var expectedValues = expected.value;
  
          if (!expectedValues || _.find(_.isArray(expectedValues) ? expectedValues : [ expectedValues ], function(statusCode) {
            return _.isRegExp(statusCode) ? statusCode.test(response.statusCode) : statusCode === response.statusCode;
          })) {
            return;
          }
  
          throw new Error(this.statusCodeErrorMessage(expected.message, expectedValues, response.statusCode));
        }