title: Is it possible to add refernece to global parameter in swagger
body: <p>I am trying to add a reference to a global parameter in an operation in swagger doc in below manner, but couldn't figure out a way to do this in swashbuckle.</p>
  
  <pre><code>"paths": {
     "&lt;path&gt;": {
     "post": {
           "parameters": [{"$ref": "#/parameters/&lt;globalparam&gt;"}]
             }
       }
    }
  </code></pre>
  
  <p>I checked out NonBodyParameter() but it doesn't have ref field defined. Is it possible to achieve this via Swashbuckle.AspNetCore?</p>