title: Swagger query parameter template
body: <p>I have on query parameter which is little bit complex and i have my own syntax to make that value. Its has more then one variable to make one complete string value.
  Let suppose name of parameter is index which has row and column like to make this value <code>20:30</code></p>
  
  <pre><code>index =  { row: 20, col:30 }
  index2 = { row: 20, col:30, chr: 15 }
  </code></pre>
  
  <p>Now i wanted to make it as </p>
  
  <pre><code>example.com?index=20:30
  example.com?index2=20:30:15
  </code></pre>
  
  <p>Can someone tell me how can i define this in swagger ?
  Thank you.</p>