title: Is it possible to define a parameter set and reference it?
body: <p>I have multiple parameters that I want to reference, but I do not want to specify them one by one.</p>
  
  <p>This snippet does not make the parameters show up:</p>
  
  <pre><code>{
      ...
      "paths": {
          "/stuff": {
              "get": {
                  "description": "Gets stuff",
                  "operationId": "getStuff",
                  "parameters": {
                      "$ref": "#/definitions/set1"
                  }
              }
          }
      },
      "parameters": {
          "a": {
              "name": "a",
              "in": "query",
              "description": "Param A",
              "required": false,
              "type": "string"
          },
          "b": {
              "name": "b",
              "in": "query",
              "description": "Param B",
              "required": false,
              "type": "string"
          }
      },
      "definitions": {
          "set1": [
              {
                  "$ref": "#/parameters/a"
              },
              {
                  "$ref": "#/parameters/b"
              }
         ],
         "set2": ...
      }
  }
  </code></pre>
  
  <p>Is this possible or do I have to specify each parameter like <code>set1</code>, for each request?</p>