* observe the new rate; only subsequent requests will.
   *
   * <p>Note though that, since each request repays (by waiting, if necessary) the cost of the
   * <i>previous</i> request, this means that the very next request after an invocation to {@code
   * setRate} will not be affected by the new rate; it will pay the cost of the previous request,
   * which is in terms of the previous rate.
   *

These are any `OPTIONS` request with `Origin` and `Access-Control-Request-Method` headers.

In this case the middleware will intercept the incoming request and respond with appropriate CORS headers, and either a `200` or `400` response for informational purposes.

### Simple requests

Any request with an `Origin` header. In this case the middleware will pass the request through as normal, but will include appropriate CORS headers on the response.

## More info

    assertThat(request.url.toString()).isEqualTo("http://example.com/")
    assertThat(request.body!!.contentLength()).isEqualTo(3)
  }

  @Test
  fun dataPost() {
    val request = fromArgs("-d", "foo", "http://example.com").createRequest()
    val body = request.body
    assertThat(request.method).isEqualTo("POST")
    assertThat(request.url.toString()).isEqualTo("http://example.com/")

	}
	for _, v := range headers {
		req := &http.Request{
			Header: http.Header{
				v.key: []string{v.val},
			},
		}
		res := GetSourceScheme(req)
		if res != v.expected {
			t.Errorf("wrong header for %s: got %s want %s", v.key, res,
				v.expected)
		}
	}
}

// TestGetSourceIP - check the source ip of a request is parsed correctly.
func TestGetSourceIP(t *testing.T) {

     *
     * @param model The model whose URLs should be normalized, may be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.
     */
    void normalize(Model model, ModelBuildingRequest request);

		Code:       "XMinioAdminTierReserved",
		Message:    "Cannot use reserved tier name",
		StatusCode: http.StatusBadRequest,
	}
)

func (api adminAPIHandlers) AddTierHandler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	objAPI, cred := validateAdminReq(ctx, w, r, policy.SetTierAction)
	if objAPI == nil {
		return
	}

	password := cred.SecretKey

     *            <code>null</code>.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */
    void injectLifecycleBindings(Model model, ModelBuildingRequest request, ModelProblemCollector problems);

	a.importIAM(w, r, "")
}

// ImportIAMV2 - imports all IAM info into MinIO
func (a adminAPIHandlers) ImportIAMV2(w http.ResponseWriter, r *http.Request) {
	a.importIAM(w, r, "v2")
}

// ImportIAM - imports all IAM info into MinIO
func (a adminAPIHandlers) importIAM(w http.ResponseWriter, r *http.Request, apiVer string) {
	ctx := r.Context()

  /** Returns an output stream where the request body can be streamed. */
  @Throws(IOException::class)
  fun createRequestBody(
    request: Request,
    contentLength: Long,
  ): Sink

  /** This should update the HTTP engine's sentRequestMillis field. */
  @Throws(IOException::class)
  fun writeRequestHeaders(request: Request)

  /** Flush the request to the underlying socket. */
  @Throws(IOException::class)
  fun flushRequest()

And it will save the returned value in a <abbr title="A utility/system to store computed/generated values, to reuse them instead of computing them again.">"cache"</abbr> and pass it to all the "dependants" that need it in that specific request, instead of calling the dependency multiple times for the same request.