code: function responseIsCollection (req) {
    let getter = req.swagger.path.get || req.swagger.path.head;
    if (getter) {
      let responses = util.getResponsesBetween(getter, 200, 299);
      if (responses.length > 0) {
        let response = new SemanticResponse(responses[0].api, req.swagger.path);
        if (!response.isEmpty) {
          return response.isCollection;
        }
      }
    }
  }
docs: Examines the GET or HEAD operation for the path and determines whether it is a collection response.
  
  @param   {Request} req
  
  @returns {boolean|undefined}
  True if the response schema is a collection.  False if it's not a collection.  Undefined if there is not response schema.