title: Feign client support for optional request param
body: <p>Does Feign client support optional request param?</p>
  
  <p>For example, I have an endpoint, but I am not finding a way to actually make the param1 optional using feign client.</p>
  
  <pre><code>@GetMapping(path = "endpoint1")
  ResponseEntity request(@RequestParam(name = "param1", required = false, defaultValue = "key") String param1){}
  </code></pre>